42632909 has 16 divisors (see below), whose sum is σ = 47957184. Its totient is φ = 37564800.

The previous prime is 42632899. The next prime is 42632927. The reversal of 42632909 is 90923624.

It is not a de Polignac number, because 42632909 - 2²⁴ = 25855693 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42632939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81569 + ... + 82089.

It is an arithmetic number, because the mean of its divisors is an integer number (2997324).

Almost surely, 2^42632909 is an apocalyptic number.

It is an amenable number.

42632909 is a deficient number, since it is larger than the sum of its proper divisors (5324275).

42632909 is a wasteful number, since it uses less digits than its factorization.

42632909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 42632909 is about 6529.3881030308. The cubic root of 42632909 is about 349.3400052101.

The spelling of 42632909 in words is "forty-two million, six hundred thirty-two thousand, nine hundred nine".