42552909 has 24 divisors (see below), whose sum is σ = 70437120. Its totient is φ = 24249888.

The previous prime is 42552901. The next prime is 42552971. The reversal of 42552909 is 90925524.

It is a happy number.

It is not a de Polignac number, because 42552909 - 2³ = 42552901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42552901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31404 + ... + 32730.

It is an arithmetic number, because the mean of its divisors is an integer number (2934880).

Almost surely, 2^42552909 is an apocalyptic number.

It is an amenable number.

42552909 is a deficient number, since it is larger than the sum of its proper divisors (27884211).

42552909 is a wasteful number, since it uses less digits than its factorization.

42552909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1849 (or 1846 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 42552909 is about 6523.2590780989. The cubic root of 42552909 is about 349.1213580027.

The spelling of 42552909 in words is "forty-two million, five hundred fifty-two thousand, nine hundred nine".