116405521 has 2 divisors, whose sum is σ = 116405522. Its totient is φ = 116405520.

The previous prime is 116405501. The next prime is 116405537. The reversal of 116405521 is 125504611.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98010000 + 18395521 = 9900^2 + 4289^2 .

It is a cyclic number.

It is not a de Polignac number, because 116405521 - 2⁵ = 116405489 is a prime.

It is not a weakly prime, because it can be changed into another prime (116405501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58202760 + 58202761.

It is an arithmetic number, because the mean of its divisors is an integer number (58202761).

Almost surely, 2^116405521 is an apocalyptic number.

It is an amenable number.

116405521 is a deficient number, since it is larger than the sum of its proper divisors (1).

116405521 is an equidigital number, since it uses as much as digits as its factorization.

116405521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 116405521 is about 10789.1390295982. The cubic root of 116405521 is about 488.2675470662.

It can be divided in two parts, 11640 and 5521, that added together give a square (17161 = 131²).

The spelling of 116405521 in words is "one hundred sixteen million, four hundred five thousand, five hundred twenty-one".