1249431 has 4 divisors (see below), whose sum is σ = 1665912. Its totient is φ = 832952.

The previous prime is 1249427. The next prime is 1249433. The reversal of 1249431 is 1349421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1349421 = 3 ⋅449807.

It is a cyclic number.

It is not a de Polignac number, because 1249431 - 2² = 1249427 is a prime.

It is a super-2 number, since 2×1249431² = 3122155647522, which contains 22 as substring.

It is an Ulam number.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249433) 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, 208236 + ... + 208241.

It is an arithmetic number, because the mean of its divisors is an integer number (416478).

2^1249431 is an apocalyptic number.

1249431 is a deficient number, since it is larger than the sum of its proper divisors (416481).

1249431 is an equidigital number, since it uses as much as digits as its factorization.

1249431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416480.

The product of its digits is 864, while the sum is 24.

The square root of 1249431 is about 1117.7794952494. The cubic root of 1249431 is about 107.7053870430.

The spelling of 1249431 in words is "one million, two hundred forty-nine thousand, four hundred thirty-one".