116521457 has 8 divisors (see below), whose sum is σ = 125861736. Its totient is φ = 107235072.

The previous prime is 116521453. The next prime is 116521469. The reversal of 116521457 is 754125611.

It can be written as a sum of positive squares in 4 ways, for example, as 10863616 + 105657841 = 3296^2 + 10279^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 116521457 - 2² = 116521453 is a prime.

It is not an unprimeable number, because it can be changed into a prime (116521453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8918 + ... + 17679.

It is an arithmetic number, because the mean of its divisors is an integer number (15732717).

Almost surely, 2^116521457 is an apocalyptic number.

It is an amenable number.

116521457 is a deficient number, since it is larger than the sum of its proper divisors (9340279).

116521457 is a wasteful number, since it uses less digits than its factorization.

116521457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26947.

The product of its digits is 8400, while the sum is 32.

The square root of 116521457 is about 10794.5105030288. The cubic root of 116521457 is about 488.4295926551.

It can be divided in two parts, 1165 and 21457, that added together give a palindrome (22622).

The spelling of 116521457 in words is "one hundred sixteen million, five hundred twenty-one thousand, four hundred fifty-seven".