42012907 has 2 divisors, whose sum is σ = 42012908. Its totient is φ = 42012906.

The previous prime is 42012863. The next prime is 42012913. The reversal of 42012907 is 70921024.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42012907 is a prime.

It is not a weakly prime, because it can be changed into another prime (42012917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21006453 + 21006454.

It is an arithmetic number, because the mean of its divisors is an integer number (21006454).

Almost surely, 2^42012907 is an apocalyptic number.

42012907 is a deficient number, since it is larger than the sum of its proper divisors (1).

42012907 is an equidigital number, since it uses as much as digits as its factorization.

42012907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 42012907 is about 6481.7364185841. The cubic root of 42012907 is about 347.6382680449.

The spelling of 42012907 in words is "forty-two million, twelve thousand, nine hundred seven".