1297031428 has 72 divisors (see below), whose sum is σ = 3001544000. Its totient is φ = 478716480.

The previous prime is 1297031383. The next prime is 1297031429. The reversal of 1297031428 is 8241307921.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1297031429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54298 + ... + 74446.

Almost surely, 2^1297031428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1297031428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1500772000).

1297031428 is an abundant number, since it is smaller than the sum of its proper divisors (1704512572).

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

1297031428 is a wasteful number, since it uses less digits than its factorization.

1297031428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20201 (or 20188 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 1297031428 is about 36014.3225397896. The cubic root of 1297031428 is about 1090.5615118835.

It can be divided in two parts, 129703 and 1428, that added together give a palindrome (131131).

The spelling of 1297031428 in words is "one billion, two hundred ninety-seven million, thirty-one thousand, four hundred twenty-eight".