1278972 has 18 divisors (see below), whose sum is σ = 3233048. Its totient is φ = 426312.

The previous prime is 1278911. The next prime is 1278983. The reversal of 1278972 is 2798721.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 35527 = 1278972 / (1 + 2 + 7 + 8 + 9 + 7 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17728 + ... + 17799.

2^1278972 is an apocalyptic number.

1278972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1278972 is an abundant number, since it is smaller than the sum of its proper divisors (1954076).

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

1278972 is a wasteful number, since it uses less digits than its factorization.

1278972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35537 (or 35532 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 1278972 is about 1130.9164425368. The cubic root of 1278972 is about 108.5476299902.

The spelling of 1278972 in words is "one million, two hundred seventy-eight thousand, nine hundred seventy-two".