1253531 has 4 divisors (see below), whose sum is σ = 1266552. Its totient is φ = 1240512.

The previous prime is 1253521. The next prime is 1253557. The reversal of 1253531 is 1353521.

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 1253531 - 2¹⁰ = 1252507 is a prime.

It is a super-2 number, since 2×1253531² = 3142679935922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1253521) 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, 6365 + ... + 6558.

It is an arithmetic number, because the mean of its divisors is an integer number (316638).

2^1253531 is an apocalyptic number.

1253531 is a deficient number, since it is larger than the sum of its proper divisors (13021).

1253531 is an equidigital number, since it uses as much as digits as its factorization.

1253531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13020.

The product of its digits is 450, while the sum is 20.

The square root of 1253531 is about 1119.6119863596. The cubic root of 1253531 is about 107.8230699292.

The spelling of 1253531 in words is "one million, two hundred fifty-three thousand, five hundred thirty-one".