1297639410 has 32 divisors (see below), whose sum is σ = 3297532032. Its totient is φ = 325681920.

The previous prime is 1297639379. The next prime is 1297639417. The reversal of 1297639410 is 149367921.

It is not an unprimeable number, because it can be changed into a prime (1297639417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1271686 + ... + 1272705.

It is an arithmetic number, because the mean of its divisors is an integer number (103047876).

Almost surely, 2^1297639410 is an apocalyptic number.

1297639410 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1297639410 is an abundant number, since it is smaller than the sum of its proper divisors (1999892622).

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

1297639410 is a wasteful number, since it uses less digits than its factorization.

1297639410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2544418.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 1297639410 is about 36022.7623871352. The cubic root of 1297639410 is about 1090.7318850864.

The spelling of 1297639410 in words is "one billion, two hundred ninety-seven million, six hundred thirty-nine thousand, four hundred ten".