1297529430 has 16 divisors (see below), whose sum is σ = 3114070704. Its totient is φ = 346007840.

The previous prime is 1297529407. The next prime is 1297529447. The reversal of 1297529430 is 349257921.

It is a super-2 number, since 2×1297529430² = 3367165243432249800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 21625461 + ... + 21625520.

It is an arithmetic number, because the mean of its divisors is an integer number (194629419).

Almost surely, 2^1297529430 is an apocalyptic number.

1297529430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1297529430 is an abundant number, since it is smaller than the sum of its proper divisors (1816541274).

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

1297529430 is a wasteful number, since it uses less digits than its factorization.

1297529430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43250991.

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 1297529430 is about 36021.2358199993. The cubic root of 1297529430 is about 1090.7010696224.

The spelling of 1297529430 in words is "one billion, two hundred ninety-seven million, five hundred twenty-nine thousand, four hundred thirty".