117573021 has 12 divisors (see below), whose sum is σ = 171579772. Its totient is φ = 77573376.

The previous prime is 117573019. The next prime is 117573023. The reversal of 117573021 is 120375711.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (117573019) and next prime (117573023).

It can be written as a sum of positive squares in 2 ways, for example, as 80192025 + 37380996 = 8955^2 + 6114^2 .

It is not a de Polignac number, because 117573021 - 2¹ = 117573019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117573023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66466 + ... + 68211.

Almost surely, 2^117573021 is an apocalyptic number.

It is an amenable number.

117573021 is a deficient number, since it is larger than the sum of its proper divisors (54006751).

117573021 is a wasteful number, since it uses less digits than its factorization.

117573021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134780 (or 134777 counting only the distinct ones).

The product of its (nonzero) digits is 1470, while the sum is 27.

The square root of 117573021 is about 10843.1093787714. The cubic root of 117573021 is about 489.8944948467.

The spelling of 117573021 in words is "one hundred seventeen million, five hundred seventy-three thousand, twenty-one".