1297885240 has 16 divisors (see below), whose sum is σ = 2920241880. Its totient is φ = 519154080.

The previous prime is 1297885229. The next prime is 1297885241. The reversal of 1297885240 is 425887921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297885241) 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 3 ways as a sum of consecutive naturals, for example, 16223526 + ... + 16223605.

Almost surely, 2^1297885240 is an apocalyptic number.

1297885240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1297885240 is an abundant number, since it is smaller than the sum of its proper divisors (1622356640).

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

1297885240 is a wasteful number, since it uses less digits than its factorization.

1297885240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32447142 (or 32447138 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 46.

The square root of 1297885240 is about 36026.1743736412. The cubic root of 1297885240 is about 1090.8007582744.

The spelling of 1297885240 in words is "one billion, two hundred ninety-seven million, eight hundred eighty-five thousand, two hundred forty".