42620431 has 4 divisors (see below), whose sum is σ = 48709072. Its totient is φ = 36531792.

The previous prime is 42620423. The next prime is 42620447. The reversal of 42620431 is 13402624.

It is a happy number.

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 42620431 - 2³ = 42620423 is a prime.

It is a super-2 number, since 2×42620431² = 3633002277251522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42620471) 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, 3044310 + ... + 3044323.

It is an arithmetic number, because the mean of its divisors is an integer number (12177268).

Almost surely, 2^42620431 is an apocalyptic number.

42620431 is a deficient number, since it is larger than the sum of its proper divisors (6088641).

42620431 is an equidigital number, since it uses as much as digits as its factorization.

42620431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6088640.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 42620431 is about 6528.4325071184. The cubic root of 42620431 is about 349.3059197267.

The spelling of 42620431 in words is "forty-two million, six hundred twenty thousand, four hundred thirty-one".