118721525 has 12 divisors (see below), whose sum is σ = 158539332. Its totient is φ = 87671040.

The previous prime is 118721509. The next prime is 118721543. The reversal of 118721525 is 525127811.

It can be written as a sum of positive squares in 6 ways, for example, as 303601 + 118417924 = 551^2 + 10882^2 .

It is not a de Polignac number, because 118721525 - 2⁴ = 118721509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 118721491 and 118721500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 182324 + ... + 182973.

It is an arithmetic number, because the mean of its divisors is an integer number (13211611).

Almost surely, 2^118721525 is an apocalyptic number.

It is an amenable number.

118721525 is a deficient number, since it is larger than the sum of its proper divisors (39817807).

118721525 is a wasteful number, since it uses less digits than its factorization.

118721525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365320 (or 365315 counting only the distinct ones).

The product of its digits is 5600, while the sum is 32.

The square root of 118721525 is about 10895.9407579153. The cubic root of 118721525 is about 491.4844956951.

The spelling of 118721525 in words is "one hundred eighteen million, seven hundred twenty-one thousand, five hundred twenty-five".