13091072 has 18 divisors (see below), whose sum is σ = 26131518. Its totient is φ = 6545408.

The previous prime is 13091059. The next prime is 13091087. The reversal of 13091072 is 27019031.

It can be written as a sum of positive squares in only one way, i.e., 12845056 + 246016 = 3584^2 + 496^2 .

It is a super-2 number, since 2×13091072² = 342752332218368, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25313 + ... + 25824.

It is an arithmetic number, because the mean of its divisors is an integer number (1451751).

Almost surely, 2^13091072 is an apocalyptic number.

It is an amenable number.

13091072 is a deficient number, since it is larger than the sum of its proper divisors (13040446).

13091072 is an frugal number, since it uses more digits than its factorization.

13091072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51153 (or 51139 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 13091072 is about 3618.1586477102. The cubic root of 13091072 is about 235.6812703945.

The spelling of 13091072 in words is "thirteen million, ninety-one thousand, seventy-two".