145485749 has 4 divisors (see below), whose sum is σ = 146898336. Its totient is φ = 144073164.

The previous prime is 145485731. The next prime is 145485757. The reversal of 145485749 is 947584541.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 145485749 - 2¹⁶ = 145420213 is a prime.

It is a super-2 number, since 2×145485749² = 42332206324182002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145482749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 706139 + ... + 706344.

It is an arithmetic number, because the mean of its divisors is an integer number (36724584).

Almost surely, 2^145485749 is an apocalyptic number.

It is an amenable number.

145485749 is a deficient number, since it is larger than the sum of its proper divisors (1412587).

145485749 is a wasteful number, since it uses less digits than its factorization.

145485749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412586.

The product of its digits is 806400, while the sum is 47.

The square root of 145485749 is about 12061.7473443942. The cubic root of 145485749 is about 525.9447828133.

The spelling of 145485749 in words is "one hundred forty-five million, four hundred eighty-five thousand, seven hundred forty-nine".