161402625 has 80 divisors (see below), whose sum is σ = 317116800. Its totient is φ = 81453600.

The previous prime is 161402623. The next prime is 161402629. The reversal of 161402625 is 526204161.

161402625 is a `hidden beast` number, since 1 + 614 + 0 + 26 + 25 = 666.

161402625 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161402625 - 2¹ = 161402623 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (161402623) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 191956 + ... + 192794.

It is an arithmetic number, because the mean of its divisors is an integer number (3963960).

Almost surely, 2^161402625 is an apocalyptic number.

161402625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161402625 is a deficient number, since it is larger than the sum of its proper divisors (155714175).

161402625 is an equidigital number, since it uses as much as digits as its factorization.

161402625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885 (or 866 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 161402625 is about 12704.4332813392. The cubic root of 161402625 is about 544.4652893202.

Adding to 161402625 its reverse (526204161), we get a palindrome (687606786).

The spelling of 161402625 in words is "one hundred sixty-one million, four hundred two thousand, six hundred twenty-five".