1279972 has 6 divisors (see below), whose sum is σ = 2239958. Its totient is φ = 639984.

The previous prime is 1279969. The next prime is 1279997. The reversal of 1279972 is 2799721.

It can be written as a sum of positive squares in only one way, i.e., 1115136 + 164836 = 1056^2 + 406^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159993 + ... + 160000.

2^1279972 is an apocalyptic number.

It is an amenable number.

1279972 is a deficient number, since it is larger than the sum of its proper divisors (959986).

1279972 is a wasteful number, since it uses less digits than its factorization.

1279972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319997 (or 319995 counting only the distinct ones).

The product of its digits is 15876, while the sum is 37.

The square root of 1279972 is about 1131.3584754621. The cubic root of 1279972 is about 108.5759129529.

The spelling of 1279972 in words is "one million, two hundred seventy-nine thousand, nine hundred seventy-two".