42157651 has 2 divisors, whose sum is σ = 42157652. Its totient is φ = 42157650.

The previous prime is 42157607. The next prime is 42157667. The reversal of 42157651 is 15675124.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42157651 is a prime.

It is not a weakly prime, because it can be changed into another prime (42157681) 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, 21078825 + 21078826.

It is an arithmetic number, because the mean of its divisors is an integer number (21078826).

Almost surely, 2^42157651 is an apocalyptic number.

42157651 is a deficient number, since it is larger than the sum of its proper divisors (1).

42157651 is an equidigital number, since it uses as much as digits as its factorization.

42157651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8400, while the sum is 31.

The square root of 42157651 is about 6492.8923447105. The cubic root of 42157651 is about 348.0370413516.

The spelling of 42157651 in words is "forty-two million, one hundred fifty-seven thousand, six hundred fifty-one".