42402497 has 4 divisors (see below), whose sum is σ = 42415536. Its totient is φ = 42389460.

The previous prime is 42402467. The next prime is 42402499. The reversal of 42402497 is 79420424.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42402497 - 2¹⁶ = 42336961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42402499) 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, 2798 + ... + 9624.

It is an arithmetic number, because the mean of its divisors is an integer number (10603884).

Almost surely, 2^42402497 is an apocalyptic number.

It is an amenable number.

42402497 is a deficient number, since it is larger than the sum of its proper divisors (13039).

42402497 is an equidigital number, since it uses as much as digits as its factorization.

42402497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13038.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 42402497 is about 6511.7199724804. The cubic root of 42402497 is about 348.7095253277.

The spelling of 42402497 in words is "forty-two million, four hundred two thousand, four hundred ninety-seven".