42474251 has 4 divisors (see below), whose sum is σ = 42602904. Its totient is φ = 42345600.

The previous prime is 42474227. The next prime is 42474281. The reversal of 42474251 is 15247424.

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 42474251 - 2¹⁴ = 42457867 is a prime.

It is a super-2 number, since 2×42474251² = 3608123996022002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42474221) 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, 63830 + ... + 64491.

It is an arithmetic number, because the mean of its divisors is an integer number (10650726).

Almost surely, 2^42474251 is an apocalyptic number.

42474251 is a deficient number, since it is larger than the sum of its proper divisors (128653).

42474251 is a wasteful number, since it uses less digits than its factorization.

42474251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128652.

The product of its digits is 8960, while the sum is 29.

The square root of 42474251 is about 6517.2272478409. The cubic root of 42474251 is about 348.9061112564.

The spelling of 42474251 in words is "forty-two million, four hundred seventy-four thousand, two hundred fifty-one".