145055540 has 96 divisors (see below), whose sum is σ = 366799104. Its totient is φ = 47139840.

The previous prime is 145055539. The next prime is 145055563. The reversal of 145055540 is 45550541.

It is a happy number.

145055540 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×145055540² = 42082219369383200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 212039 + ... + 212721.

It is an arithmetic number, because the mean of its divisors is an integer number (3820824).

Almost surely, 2^145055540 is an apocalyptic number.

145055540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145055540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183399552).

145055540 is an abundant number, since it is smaller than the sum of its proper divisors (221743564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145055540 is a wasteful number, since it uses less digits than its factorization.

145055540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777 (or 775 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 29.

The square root of 145055540 is about 12043.9005309742. The cubic root of 145055540 is about 525.4258555306.

The spelling of 145055540 in words is "one hundred forty-five million, fifty-five thousand, five hundred forty".