1252052621 has 2 divisors, whose sum is σ = 1252052622. Its totient is φ = 1252052620.

The previous prime is 1252052617. The next prime is 1252052663. The reversal of 1252052621 is 1262502521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1020099721 + 231952900 = 31939^2 + 15230^2 .

It is a cyclic number.

It is not a de Polignac number, because 1252052621 - 2² = 1252052617 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1252052821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626026310 + 626026311.

It is an arithmetic number, because the mean of its divisors is an integer number (626026311).

Almost surely, 2^1252052621 is an apocalyptic number.

It is an amenable number.

1252052621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252052621 is an equidigital number, since it uses as much as digits as its factorization.

1252052621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1252052621 is about 35384.3555967888. The cubic root of 1252052621 is about 1077.8066542843.

The spelling of 1252052621 in words is "one billion, two hundred fifty-two million, fifty-two thousand, six hundred twenty-one".