115447421 has 2 divisors, whose sum is σ = 115447422. Its totient is φ = 115447420.

The previous prime is 115447417. The next prime is 115447427. The reversal of 115447421 is 124744511.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108451396 + 6996025 = 10414^2 + 2645^2 .

It is a cyclic number.

It is not a de Polignac number, because 115447421 - 2² = 115447417 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115447427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57723710 + 57723711.

It is an arithmetic number, because the mean of its divisors is an integer number (57723711).

Almost surely, 2^115447421 is an apocalyptic number.

It is an amenable number.

115447421 is a deficient number, since it is larger than the sum of its proper divisors (1).

115447421 is an equidigital number, since it uses as much as digits as its factorization.

115447421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4480, while the sum is 29.

The square root of 115447421 is about 10744.6461551789. The cubic root of 115447421 is about 486.9242588184.

The spelling of 115447421 in words is "one hundred fifteen million, four hundred forty-seven thousand, four hundred twenty-one".