1298123936 has 24 divisors (see below), whose sum is σ = 2564925300. Its totient is φ = 646714368.

The previous prime is 1298123917. The next prime is 1298123941. The reversal of 1298123936 is 6393218921.

It can be written as a sum of positive squares in 2 ways, for example, as 1292833936 + 5290000 = 35956^2 + 2300^2 .

It is a super-2 number, since 2×1298123936² = 3370251506432264192, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64361 + ... + 82088.

Almost surely, 2^1298123936 is an apocalyptic number.

1298123936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1298123936 is a deficient number, since it is larger than the sum of its proper divisors (1266801364).

1298123936 is a wasteful number, since it uses less digits than its factorization.

1298123936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146736 (or 146728 counting only the distinct ones).

The product of its digits is 139968, while the sum is 44.

The square root of 1298123936 is about 36029.4870349274. The cubic root of 1298123936 is about 1090.8676244373.

The spelling of 1298123936 in words is "one billion, two hundred ninety-eight million, one hundred twenty-three thousand, nine hundred thirty-six".