161512425 has 36 divisors (see below), whose sum is σ = 289985904. Its totient is φ = 85932000.

The previous prime is 161512423. The next prime is 161512447. The reversal of 161512425 is 524215161.

161512425 is a `hidden beast` number, since 1 + 615 + 1 + 2 + 42 + 5 = 666.

It is not a de Polignac number, because 161512425 - 2¹ = 161512423 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161512423) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 153150 + ... + 154200.

It is an arithmetic number, because the mean of its divisors is an integer number (8055164).

Almost surely, 2^161512425 is an apocalyptic number.

161512425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161512425 is a deficient number, since it is larger than the sum of its proper divisors (128473479).

161512425 is a wasteful number, since it uses less digits than its factorization.

161512425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1750 (or 1742 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 161512425 is about 12708.7538728233. The cubic root of 161512425 is about 544.5887254323.

Adding to 161512425 its reverse (524215161), we get a palindrome (685727586).

The spelling of 161512425 in words is "one hundred sixty-one million, five hundred twelve thousand, four hundred twenty-five".