161263125 has 30 divisors (see below), whose sum is σ = 291086510. Its totient is φ = 86004000.

The previous prime is 161263073. The next prime is 161263133. The reversal of 161263125 is 521362161.

161263125 is a `hidden beast` number, since 1 + 6 + 1 + 2 + 631 + 25 = 666.

161263125 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 5 ways, for example, as 38452401 + 122810724 = 6201^2 + 11082^2 .

It is not a de Polignac number, because 161263125 - 2⁶ = 161263061 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 8710 + ... + 19959.

Almost surely, 2^161263125 is an apocalyptic number.

161263125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161263125 is a deficient number, since it is larger than the sum of its proper divisors (129823385).

161263125 is an equidigital number, since it uses as much as digits as its factorization.

161263125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28695 (or 28677 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 161263125 is about 12698.9418850548. The cubic root of 161263125 is about 544.3083839821.

The spelling of 161263125 in words is "one hundred sixty-one million, two hundred sixty-three thousand, one hundred twenty-five".