1297597590 has 128 divisors (see below), whose sum is σ = 3856896000. Its totient is φ = 308510208.

The previous prime is 1297597559. The next prime is 1297597591. The reversal of 1297597590 is 957957921.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297597591) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 79771 + ... + 94649.

It is an arithmetic number, because the mean of its divisors is an integer number (30132000).

Almost surely, 2^1297597590 is an apocalyptic number.

1297597590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1297597590, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1928448000).

1297597590 is an abundant number, since it is smaller than the sum of its proper divisors (2559298410).

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

1297597590 is a wasteful number, since it uses less digits than its factorization.

1297597590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14931 (or 14925 counting only the distinct ones).

The product of its (nonzero) digits is 1786050, while the sum is 54.

The square root of 1297597590 is about 36022.1819161472. The cubic root of 1297597590 is about 1090.7201676820.

The spelling of 1297597590 in words is "one billion, two hundred ninety-seven million, five hundred ninety-seven thousand, five hundred ninety".