117522421 has 2 divisors, whose sum is σ = 117522422. Its totient is φ = 117522420.

The previous prime is 117522337. The next prime is 117522463. The reversal of 117522421 is 124225711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105370225 + 12152196 = 10265^2 + 3486^2 .

It is a cyclic number.

It is not a de Polignac number, because 117522421 - 2²³ = 109133813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117522121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58761210 + 58761211.

It is an arithmetic number, because the mean of its divisors is an integer number (58761211).

Almost surely, 2^117522421 is an apocalyptic number.

It is an amenable number.

117522421 is a deficient number, since it is larger than the sum of its proper divisors (1).

117522421 is an equidigital number, since it uses as much as digits as its factorization.

117522421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1120, while the sum is 25.

The square root of 117522421 is about 10840.7758486190. The cubic root of 117522421 is about 489.8242059937.

The spelling of 117522421 in words is "one hundred seventeen million, five hundred twenty-two thousand, four hundred twenty-one".