1253259221 has 4 divisors (see below), whose sum is σ = 1264972032. Its totient is φ = 1241546412.

The previous prime is 1253259197. The next prime is 1253259233. The reversal of 1253259221 is 1229523521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1253259221 - 2¹⁸ = 1252997077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253259281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5856245 + ... + 5856458.

It is an arithmetic number, because the mean of its divisors is an integer number (316243008).

Almost surely, 2^1253259221 is an apocalyptic number.

It is an amenable number.

1253259221 is a deficient number, since it is larger than the sum of its proper divisors (11712811).

1253259221 is a wasteful number, since it uses less digits than its factorization.

1253259221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11712810.

The product of its digits is 10800, while the sum is 32.

The square root of 1253259221 is about 35401.4013988147. The cubic root of 1253259221 is about 1078.1527696562.

The spelling of 1253259221 in words is "one billion, two hundred fifty-three million, two hundred fifty-nine thousand, two hundred twenty-one".