1297683040 has 48 divisors (see below), whose sum is σ = 3107801088. Its totient is φ = 511958016.

The previous prime is 1297682999. The next prime is 1297683067. The reversal of 1297683040 is 403867921.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 1297682984 and 1297683002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43872 + ... + 67231.

It is an arithmetic number, because the mean of its divisors is an integer number (64745856).

Almost surely, 2^1297683040 is an apocalyptic number.

1297683040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1297683040 is an abundant number, since it is smaller than the sum of its proper divisors (1810118048).

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

1297683040 is a wasteful number, since it uses less digits than its factorization.

1297683040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111191 (or 111183 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 1297683040 is about 36023.3679713599. The cubic root of 1297683040 is about 1090.7441093604.

The spelling of 1297683040 in words is "one billion, two hundred ninety-seven million, six hundred eighty-three thousand, forty".