1297520 has 60 divisors (see below), whose sum is σ = 3519864. Its totient is φ = 443520.

The previous prime is 1297519. The next prime is 1297523. The reversal of 1297520 is 257921.

It is a self number, because there is not a number n which added to its sum of digits gives 1297520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3755 + ... + 4085.

2^1297520 is an apocalyptic number.

1297520 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 1297520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1759932).

1297520 is an abundant number, since it is smaller than the sum of its proper divisors (2222344).

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

1297520 is a wasteful number, since it uses less digits than its factorization.

1297520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 345 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 1297520 is about 1139.0873539812. The cubic root of 1297520 is about 109.0698427335.

The spelling of 1297520 in words is "one million, two hundred ninety-seven thousand, five hundred twenty".