1297197590 has 32 divisors (see below), whose sum is σ = 2549032416. Its totient is φ = 472400640.

The previous prime is 1297197569. The next prime is 1297197599. The reversal of 1297197590 is 957917921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297197599) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58856 + ... + 77835.

It is an arithmetic number, because the mean of its divisors is an integer number (79657263).

Almost surely, 2^1297197590 is an apocalyptic number.

1297197590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1297197590 is a deficient number, since it is larger than the sum of its proper divisors (1251834826).

1297197590 is a wasteful number, since it uses less digits than its factorization.

1297197590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136784.

The product of its (nonzero) digits is 357210, while the sum is 50.

The square root of 1297197590 is about 36016.6293536749. The cubic root of 1297197590 is about 1090.6080803116.

The spelling of 1297197590 in words is "one billion, two hundred ninety-seven million, one hundred ninety-seven thousand, five hundred ninety".