115121491 has 2 divisors, whose sum is σ = 115121492. Its totient is φ = 115121490.

The previous prime is 115121473. The next prime is 115121519. The reversal of 115121491 is 194121511.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115121491 is a prime.

It is a super-3 number, since 3×115121491³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (115121431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57560745 + 57560746.

It is an arithmetic number, because the mean of its divisors is an integer number (57560746).

Almost surely, 2^115121491 is an apocalyptic number.

115121491 is a deficient number, since it is larger than the sum of its proper divisors (1).

115121491 is an equidigital number, since it uses as much as digits as its factorization.

115121491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 360, while the sum is 25.

The square root of 115121491 is about 10729.4683465678. The cubic root of 115121491 is about 486.4656003608.

The spelling of 115121491 in words is "one hundred fifteen million, one hundred twenty-one thousand, four hundred ninety-one".