1252433421 has 36 divisors (see below), whose sum is σ = 1961389248. Its totient is φ = 798571224.

The previous prime is 1252433389. The next prime is 1252433423. The reversal of 1252433421 is 1243342521.

It is not a de Polignac number, because 1252433421 - 2⁵ = 1252433389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252433423) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 123676 + ... + 133418.

Almost surely, 2^1252433421 is an apocalyptic number.

It is an amenable number.

1252433421 is a deficient number, since it is larger than the sum of its proper divisors (708955827).

1252433421 is an frugal number, since it uses more digits than its factorization.

1252433421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9804 (or 9769 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 1252433421 is about 35389.7360967838. The cubic root of 1252433421 is about 1077.9159114526.

Adding to 1252433421 its reverse (1243342521), we get a palindrome (2495775942).

The spelling of 1252433421 in words is "one billion, two hundred fifty-two million, four hundred thirty-three thousand, four hundred twenty-one".