1253432321 has 16 divisors (see below), whose sum is σ = 1343952000. Its totient is φ = 1164844800.

The previous prime is 1253432309. The next prime is 1253432329. The reversal of 1253432321 is 1232343521.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1253432321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1253432329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 835430 + ... + 836928.

It is an arithmetic number, because the mean of its divisors is an integer number (83997000).

Almost surely, 2^1253432321 is an apocalyptic number.

It is an amenable number.

1253432321 is a deficient number, since it is larger than the sum of its proper divisors (90519679).

1253432321 is a wasteful number, since it uses less digits than its factorization.

1253432321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2104.

The product of its digits is 4320, while the sum is 26.

The square root of 1253432321 is about 35403.8461328709. The cubic root of 1253432321 is about 1078.2024054777.

Adding to 1253432321 its reverse (1232343521), we get a palindrome (2485775842).

The spelling of 1253432321 in words is "one billion, two hundred fifty-three million, four hundred thirty-two thousand, three hundred twenty-one".