1297980 has 36 divisors (see below), whose sum is σ = 3937752. Its totient is φ = 346080.

The previous prime is 1297979. The next prime is 1297993. The reversal of 1297980 is 897921.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3426 + ... + 3785.

It is an arithmetic number, because the mean of its divisors is an integer number (109382).

2^1297980 is an apocalyptic number.

1297980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1297980 is an abundant number, since it is smaller than the sum of its proper divisors (2639772).

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

1297980 is a wasteful number, since it uses less digits than its factorization.

1297980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7226 (or 7221 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 1297980 is about 1139.2892521217. The cubic root of 1297980 is about 109.0827304475.

The spelling of 1297980 in words is "one million, two hundred ninety-seven thousand, nine hundred eighty".