42920407 has 16 divisors (see below), whose sum is σ = 46046880. Its totient is φ = 39940992.

The previous prime is 42920389. The next prime is 42920417. The reversal of 42920407 is 70402924.

It is a cyclic number.

It is not a de Polignac number, because 42920407 - 2⁷ = 42920279 is a prime.

It is a super-2 number, since 2×42920407² = 3684322674091298, 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 (42920417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84069 + ... + 84577.

It is an arithmetic number, because the mean of its divisors is an integer number (2877930).

Almost surely, 2^42920407 is an apocalyptic number.

42920407 is a deficient number, since it is larger than the sum of its proper divisors (3126473).

42920407 is a wasteful number, since it uses less digits than its factorization.

42920407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 42920407 is about 6551.3668039578. The cubic root of 42920407 is about 350.1235128705.

The spelling of 42920407 in words is "forty-two million, nine hundred twenty thousand, four hundred seven".