1252381321 has 9 divisors (see below), whose sum is σ = 1283743629. Its totient is φ = 1221769836.

The previous prime is 1252381297. The next prime is 1252381331. The reversal of 1252381321 is 1231832521.

The square root of 1252381321 is 35389.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 1252381321 - 2⁵ = 1252381289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1252381321.

It is not an unprimeable number, because it can be changed into a prime (1252381331) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1521316 + ... + 1522138.

It is an arithmetic number, because the mean of its divisors is an integer number (142638181).

Almost surely, 2^1252381321 is an apocalyptic number.

1252381321 is the 35389-th square number.

1252381321 is the 17695-th centered octagonal number.

It is an amenable number.

1252381321 is a deficient number, since it is larger than the sum of its proper divisors (31362308).

1252381321 is an frugal number, since it uses more digits than its factorization.

1252381321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1732 (or 866 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The cubic root of 1252381321 is about 1077.9009644976.

The spelling of 1252381321 in words is "one billion, two hundred fifty-two million, three hundred eighty-one thousand, three hundred twenty-one".