1253151321 has 4 divisors (see below), whose sum is σ = 1670868432. Its totient is φ = 835434212.

The previous prime is 1253151307. The next prime is 1253151337. The reversal of 1253151321 is 1231513521.

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 1253151321 - 2⁶ = 1253151257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1253151291 and 1253151300.

It is not an unprimeable number, because it can be changed into a prime (1253151391) 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, 208858551 + ... + 208858556.

It is an arithmetic number, because the mean of its divisors is an integer number (417717108).

Almost surely, 2^1253151321 is an apocalyptic number.

It is an amenable number.

1253151321 is a deficient number, since it is larger than the sum of its proper divisors (417717111).

1253151321 is an equidigital number, since it uses as much as digits as its factorization.

1253151321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417717110.

The product of its digits is 900, while the sum is 24.

The square root of 1253151321 is about 35399.8774150420. The cubic root of 1253151321 is about 1078.1218273950.

Adding to 1253151321 its reverse (1231513521), we get a palindrome (2484664842).

The spelling of 1253151321 in words is "one billion, two hundred fifty-three million, one hundred fifty-one thousand, three hundred twenty-one".