1297917432 has 112 divisors (see below), whose sum is σ = 4170101040. Its totient is φ = 370821888.

The previous prime is 1297917427. The next prime is 1297917433. The reversal of 1297917432 is 2347197921.

1297917432 is a `hidden beast` number, since 129 + 7 + 91 + 7 + 432 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297917433) 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 27 ways as a sum of consecutive naturals, for example, 24928 + ... + 56720.

It is an arithmetic number, because the mean of its divisors is an integer number (37233045).

Almost surely, 2^1297917432 is an apocalyptic number.

1297917432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1297917432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2085050520).

1297917432 is an abundant number, since it is smaller than the sum of its proper divisors (2872183608).

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

1297917432 is an equidigital number, since it uses as much as digits as its factorization.

1297917432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31824 (or 31805 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 1297917432 is about 36026.6211571388. The cubic root of 1297917432 is about 1090.8097767316.

The spelling of 1297917432 in words is "one billion, two hundred ninety-seven million, nine hundred seventeen thousand, four hundred thirty-two".