1297815420 has 48 divisors (see below), whose sum is σ = 3964238208. Its totient is φ = 314621760.

The previous prime is 1297815383. The next prime is 1297815433. The reversal of 1297815420 is 245187921.

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, 982534 + ... + 983853.

It is an arithmetic number, because the mean of its divisors is an integer number (82588296).

Almost surely, 2^1297815420 is an apocalyptic number.

1297815420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1297815420 is an abundant number, since it is smaller than the sum of its proper divisors (2666422788).

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

1297815420 is a wasteful number, since it uses less digits than its factorization.

1297815420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1966410 (or 1966408 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 1297815420 is about 36025.2053429262. The cubic root of 1297815420 is about 1090.7811979742.

The spelling of 1297815420 in words is "one billion, two hundred ninety-seven million, eight hundred fifteen thousand, four hundred twenty".