115156421 has 2 divisors, whose sum is σ = 115156422. Its totient is φ = 115156420.

The previous prime is 115156411. The next prime is 115156427. The reversal of 115156421 is 124651511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65383396 + 49773025 = 8086^2 + 7055^2 .

It is a cyclic number.

It is not a de Polignac number, because 115156421 - 2¹⁴ = 115140037 is a prime.

It is a super-2 number, since 2×115156421² = 26522002595058482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115156427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57578210 + 57578211.

It is an arithmetic number, because the mean of its divisors is an integer number (57578211).

Almost surely, 2^115156421 is an apocalyptic number.

It is an amenable number.

115156421 is a deficient number, since it is larger than the sum of its proper divisors (1).

115156421 is an equidigital number, since it uses as much as digits as its factorization.

115156421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1200, while the sum is 26.

The square root of 115156421 is about 10731.0959831697. The cubic root of 115156421 is about 486.5147962870.

The spelling of 115156421 in words is "one hundred fifteen million, one hundred fifty-six thousand, four hundred twenty-one".