42692621 has 2 divisors, whose sum is σ = 42692622. Its totient is φ = 42692620.

The previous prime is 42692579. The next prime is 42692633. The reversal of 42692621 is 12629624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29106025 + 13586596 = 5395^2 + 3686^2 .

It is a cyclic number.

It is not a de Polignac number, because 42692621 - 2⁶ = 42692557 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42692641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21346310 + 21346311.

It is an arithmetic number, because the mean of its divisors is an integer number (21346311).

Almost surely, 2^42692621 is an apocalyptic number.

It is an amenable number.

42692621 is a deficient number, since it is larger than the sum of its proper divisors (1).

42692621 is an equidigital number, since it uses as much as digits as its factorization.

42692621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 32.

The square root of 42692621 is about 6533.9590601717. The cubic root of 42692621 is about 349.5030252780.

The spelling of 42692621 in words is "forty-two million, six hundred ninety-two thousand, six hundred twenty-one".