42492451 has 4 divisors (see below), whose sum is σ = 42882400. Its totient is φ = 42102504.

The previous prime is 42492421. The next prime is 42492467. The reversal of 42492451 is 15429424.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42492451 - 2⁵ = 42492419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42492421) 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, 194811 + ... + 195028.

It is an arithmetic number, because the mean of its divisors is an integer number (10720600).

Almost surely, 2^42492451 is an apocalyptic number.

42492451 is a deficient number, since it is larger than the sum of its proper divisors (389949).

42492451 is a wasteful number, since it uses less digits than its factorization.

42492451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389948.

The product of its digits is 11520, while the sum is 31.

The square root of 42492451 is about 6518.6233976201. The cubic root of 42492451 is about 348.9559389700.

The spelling of 42492451 in words is "forty-two million, four hundred ninety-two thousand, four hundred fifty-one".