126502421 has 2 divisors, whose sum is σ = 126502422. Its totient is φ = 126502420.

The previous prime is 126502417. The next prime is 126502433. The reversal of 126502421 is 124205621.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107019025 + 19483396 = 10345^2 + 4414^2 .

It is a cyclic number.

It is not a de Polignac number, because 126502421 - 2² = 126502417 is a prime.

It is a super-2 number, since 2×126502421² = 32005725037722482, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126502121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63251210 + 63251211.

It is an arithmetic number, because the mean of its divisors is an integer number (63251211).

Almost surely, 2^126502421 is an apocalyptic number.

It is an amenable number.

126502421 is a deficient number, since it is larger than the sum of its proper divisors (1).

126502421 is an equidigital number, since it uses as much as digits as its factorization.

126502421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 126502421 is about 11247.3295052648. The cubic root of 126502421 is about 501.9952553215.

The spelling of 126502421 in words is "one hundred twenty-six million, five hundred two thousand, four hundred twenty-one".