152637421 has 2 divisors, whose sum is σ = 152637422. Its totient is φ = 152637420.

The previous prime is 152637409. The next prime is 152637427. The reversal of 152637421 is 124736251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152522500 + 114921 = 12350^2 + 339^2 .

It is a cyclic number.

It is not a de Polignac number, because 152637421 - 2⁵ = 152637389 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (152637427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76318710 + 76318711.

It is an arithmetic number, because the mean of its divisors is an integer number (76318711).

Almost surely, 2^152637421 is an apocalyptic number.

It is an amenable number.

152637421 is a deficient number, since it is larger than the sum of its proper divisors (1).

152637421 is an equidigital number, since it uses as much as digits as its factorization.

152637421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 31.

The square root of 152637421 is about 12354.6517959836. The cubic root of 152637421 is about 534.4252960468.

The spelling of 152637421 in words is "one hundred fifty-two million, six hundred thirty-seven thousand, four hundred twenty-one".