1299521070 has 40 divisors (see below), whose sum is σ = 3494269944. Its totient is φ = 346538736.

The previous prime is 1299521057. The next prime is 1299521071. The reversal of 1299521070 is 701259921.

1299521070 is a `hidden beast` number, since 129 + 9 + 521 + 0 + 7 + 0 = 666.

It is a super-2 number, since 2×1299521070² = 3377510022747889800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299521071) 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 19 ways as a sum of consecutive naturals, for example, 801364 + ... + 802983.

Almost surely, 2^1299521070 is an apocalyptic number.

1299521070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1299521070 is an abundant number, since it is smaller than the sum of its proper divisors (2194748874).

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

1299521070 is a wasteful number, since it uses less digits than its factorization.

1299521070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1604366 (or 1604357 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The square root of 1299521070 is about 36048.8705787019. The cubic root of 1299521070 is about 1091.2588407545.

The spelling of 1299521070 in words is "one billion, two hundred ninety-nine million, five hundred twenty-one thousand, seventy".