1252431 has 18 divisors (see below), whose sum is σ = 1895712. Its totient is φ = 795960.

The previous prime is 1252429. The next prime is 1252439. The reversal of 1252431 is 1342521.

It is not a de Polignac number, because 1252431 - 2¹ = 1252429 is a prime.

It is a super-2 number, since 2×1252431² = 3137166819522, which contains 22 as substring.

1252431 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 18660 + ... + 18726.

2^1252431 is an apocalyptic number.

1252431 is a deficient number, since it is larger than the sum of its proper divisors (643281).

1252431 is an equidigital number, since it uses as much as digits as its factorization.

1252431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 101 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 1252431 is about 1119.1206369288. The cubic root of 1252431 is about 107.7915216902.

Adding to 1252431 its reverse (1342521), we get a palindrome (2594952).

It can be divided in two parts, 125 and 2431, that added together give a triangular number (2556 = T₇₁).

The spelling of 1252431 in words is "one million, two hundred fifty-two thousand, four hundred thirty-one".