1297694720 has 240 divisors, whose sum is σ = 3724428288. Its totient is φ = 424673280.

The previous prime is 1297694719. The next prime is 1297694743. The reversal of 1297694720 is 274967921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17776604 + ... + 17776676.

Almost surely, 2^1297694720 is an apocalyptic number.

1297694720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1297694720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1862214144).

1297694720 is an abundant number, since it is smaller than the sum of its proper divisors (2426733568).

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

1297694720 is an frugal number, since it uses more digits than its factorization.

1297694720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 1297694720 is about 36023.5300879855. The cubic root of 1297694720 is about 1090.7473818218.

The spelling of 1297694720 in words is "one billion, two hundred ninety-seven million, six hundred ninety-four thousand, seven hundred twenty".