1253603431 has 4 divisors (see below), whose sum is σ = 1308107952. Its totient is φ = 1199098912.

The previous prime is 1253603347. The next prime is 1253603437. The reversal of 1253603431 is 1343063521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1253603431 - 2⁷ = 1253603303 is a prime.

It is a super-2 number, since 2×1253603431² = 3143043124429943522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1253603431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253603437) 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, 27252226 + ... + 27252271.

It is an arithmetic number, because the mean of its divisors is an integer number (327026988).

Almost surely, 2^1253603431 is an apocalyptic number.

1253603431 is a deficient number, since it is larger than the sum of its proper divisors (54504521).

1253603431 is an equidigital number, since it uses as much as digits as its factorization.

1253603431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54504520.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 1253603431 is about 35406.2625957612. The cubic root of 1253603431 is about 1078.2514661824.

Adding to 1253603431 its reverse (1343063521), we get a palindrome (2596666952).

The spelling of 1253603431 in words is "one billion, two hundred fifty-three million, six hundred three thousand, four hundred thirty-one".