1297579490 has 8 divisors (see below), whose sum is σ = 2335643100. Its totient is φ = 519031792.

The previous prime is 1297579489. The next prime is 1297579499. The reversal of 1297579490 is 949757921.

It can be written as a sum of positive squares in 2 ways, for example, as 1235311609 + 62267881 = 35147^2 + 7891^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1297579499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64878965 + ... + 64878984.

Almost surely, 2^1297579490 is an apocalyptic number.

1297579490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1297579490 is a deficient number, since it is larger than the sum of its proper divisors (1038063610).

1297579490 is a wasteful number, since it uses less digits than its factorization.

1297579490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129757956.

The product of its (nonzero) digits is 1428840, while the sum is 53.

The square root of 1297579490 is about 36021.9306811837. The cubic root of 1297579490 is about 1090.7150962261.

The spelling of 1297579490 in words is "one billion, two hundred ninety-seven million, five hundred seventy-nine thousand, four hundred ninety".