1272431 has 4 divisors (see below), whose sum is σ = 1299552. Its totient is φ = 1245312.

The previous prime is 1272421. The next prime is 1272443. The reversal of 1272431 is 1342721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1342721 = 937 ⋅1433.

It is not a de Polignac number, because 1272431 - 2⁶ = 1272367 is a prime.

It is a super-2 number, since 2×1272431² = 3238161299522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13490 + ... + 13583.

It is an arithmetic number, because the mean of its divisors is an integer number (324888).

2^1272431 is an apocalyptic number.

1272431 is a deficient number, since it is larger than the sum of its proper divisors (27121).

1272431 is an equidigital number, since it uses as much as digits as its factorization.

1272431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27120.

The product of its digits is 336, while the sum is 20.

The square root of 1272431 is about 1128.0208331409. The cubic root of 1272431 is about 108.3622665652.

The spelling of 1272431 in words is "one million, two hundred seventy-two thousand, four hundred thirty-one".