8737125421 has 2 divisors, whose sum is σ = 8737125422. Its totient is φ = 8737125420.

The previous prime is 8737125361. The next prime is 8737125431. The reversal of 8737125421 is 1245217378.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8674873321 + 62252100 = 93139^2 + 7890^2 .

It is a cyclic number.

It is not a de Polignac number, because 8737125421 - 2¹³ = 8737117229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8737125431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4368562710 + 4368562711.

It is an arithmetic number, because the mean of its divisors is an integer number (4368562711).

Almost surely, 2^8737125421 is an apocalyptic number.

It is an amenable number.

8737125421 is a deficient number, since it is larger than the sum of its proper divisors (1).

8737125421 is an equidigital number, since it uses as much as digits as its factorization.

8737125421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94080, while the sum is 40.

The square root of 8737125421 is about 93472.5918170669. The cubic root of 8737125421 is about 2059.6314907006.

The spelling of 8737125421 in words is "eight billion, seven hundred thirty-seven million, one hundred twenty-five thousand, four hundred twenty-one".