1299972 has 24 divisors (see below), whose sum is σ = 3060736. Its totient is φ = 429408.

The previous prime is 1299953. The next prime is 1299979. The reversal of 1299972 is 2799921.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1299972.

It is not an unprimeable number, because it can be changed into a prime (1299979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1098 + ... + 1950.

2^1299972 is an apocalyptic number.

1299972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1299972 is an abundant number, since it is smaller than the sum of its proper divisors (1760764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1299972 is a wasteful number, since it uses less digits than its factorization.

1299972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 987 (or 985 counting only the distinct ones).

The product of its digits is 20412, while the sum is 39.

The square root of 1299972 is about 1140.1631462208. The cubic root of 1299972 is about 109.1385047364.

It can be divided in two parts, 129 and 9972, that added together give a palindrome (10101).

The spelling of 1299972 in words is "one million, two hundred ninety-nine thousand, nine hundred seventy-two".