1299431 has 12 divisors (see below), whose sum is σ = 1578672. Its totient is φ = 1064448.

The previous prime is 1299379. The next prime is 1299437. The reversal of 1299431 is 1349921.

It is a happy number.

It is not a de Polignac number, because 1299431 - 2⁶ = 1299367 is a prime.

It is a super-2 number, since 2×1299431² = 3377041847522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1299394 and 1299403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 551 + ... + 1703.

It is an arithmetic number, because the mean of its divisors is an integer number (131556).

2^1299431 is an apocalyptic number.

1299431 is a deficient number, since it is larger than the sum of its proper divisors (279241).

1299431 is a wasteful number, since it uses less digits than its factorization.

1299431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190 (or 1183 counting only the distinct ones).

The product of its digits is 1944, while the sum is 29.

The square root of 1299431 is about 1139.9258747831. The cubic root of 1299431 is about 109.1233628401.

The spelling of 1299431 in words is "one million, two hundred ninety-nine thousand, four hundred thirty-one".