42427951 has 4 divisors (see below), whose sum is σ = 43061272. Its totient is φ = 41794632.

The previous prime is 42427921. The next prime is 42427993. The reversal of 42427951 is 15972424.

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 42427951 - 2⁵ = 42427919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42427901) 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, 316560 + ... + 316693.

It is an arithmetic number, because the mean of its divisors is an integer number (10765318).

Almost surely, 2^42427951 is an apocalyptic number.

42427951 is a deficient number, since it is larger than the sum of its proper divisors (633321).

42427951 is an equidigital number, since it uses as much as digits as its factorization.

42427951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633320.

The product of its digits is 20160, while the sum is 34.

The square root of 42427951 is about 6513.6741551908. The cubic root of 42427951 is about 348.7792875461.

The spelling of 42427951 in words is "forty-two million, four hundred twenty-seven thousand, nine hundred fifty-one".