1297547620 has 48 divisors (see below), whose sum is σ = 2872074240. Its totient is φ = 491049216.

The previous prime is 1297547617. The next prime is 1297547621. The reversal of 1297547620 is 267457921.

It is not an unprimeable number, because it can be changed into a prime (1297547621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 360349 + ... + 363931.

It is an arithmetic number, because the mean of its divisors is an integer number (59834880).

Almost surely, 2^1297547620 is an apocalyptic number.

1297547620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1297547620 is an abundant number, since it is smaller than the sum of its proper divisors (1574526620).

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

1297547620 is a wasteful number, since it uses less digits than its factorization.

1297547620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4564 (or 4562 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 1297547620 is about 36021.4883090635. The cubic root of 1297547620 is about 1090.7061664264.

The spelling of 1297547620 in words is "one billion, two hundred ninety-seven million, five hundred forty-seven thousand, six hundred twenty".