1305697272 has 64 divisors (see below), whose sum is σ = 3609826560. Its totient is φ = 390240000.

The previous prime is 1305697249. The next prime is 1305697331. The reversal of 1305697272 is 2727965031.

It is a super-2 number, since 2×1305697272² = 3409690732216483968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 14604 + ... + 53147.

It is an arithmetic number, because the mean of its divisors is an integer number (56403540).

Almost surely, 2^1305697272 is an apocalyptic number.

1305697272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1305697272 is an abundant number, since it is smaller than the sum of its proper divisors (2304129288).

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

1305697272 is a wasteful number, since it uses less digits than its factorization.

1305697272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67844 (or 67840 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 42.

The square root of 1305697272 is about 36134.4333288900. The cubic root of 1305697272 is about 1092.9849088877.

The spelling of 1305697272 in words is "one billion, three hundred five million, six hundred ninety-seven thousand, two hundred seventy-two".