113161421 has 2 divisors, whose sum is σ = 113161422. Its totient is φ = 113161420.

The previous prime is 113161387. The next prime is 113161427. The reversal of 113161421 is 124161311.

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., 59505796 + 53655625 = 7714^2 + 7325^2 .

It is a cyclic number.

It is not a de Polignac number, because 113161421 - 2²⁶ = 46052557 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 113161393 and 113161402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113161427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56580710 + 56580711.

It is an arithmetic number, because the mean of its divisors is an integer number (56580711).

Almost surely, 2^113161421 is an apocalyptic number.

It is an amenable number.

113161421 is a deficient number, since it is larger than the sum of its proper divisors (1).

113161421 is an equidigital number, since it uses as much as digits as its factorization.

113161421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 20.

The square root of 113161421 is about 10637.7357083169. The cubic root of 113161421 is about 483.6889108649.

The spelling of 113161421 in words is "one hundred thirteen million, one hundred sixty-one thousand, four hundred twenty-one".