161304425 has 12 divisors (see below), whose sum is σ = 201028800. Its totient is φ = 128391120.

The previous prime is 161304421. The next prime is 161304463. The reversal of 161304425 is 524403161.

It is not a de Polignac number, because 161304425 - 2² = 161304421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161304394 and 161304403.

It is not an unprimeable number, because it can be changed into a prime (161304421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11237 + ... + 21186.

It is an arithmetic number, because the mean of its divisors is an integer number (16752400).

Almost surely, 2^161304425 is an apocalyptic number.

It is an amenable number.

161304425 is a deficient number, since it is larger than the sum of its proper divisors (39724375).

161304425 is a wasteful number, since it uses less digits than its factorization.

161304425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32632 (or 32627 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 161304425 is about 12700.5679006885. The cubic root of 161304425 is about 544.3548463862.

Adding to 161304425 its reverse (524403161), we get a palindrome (685707586).

The spelling of 161304425 in words is "one hundred sixty-one million, three hundred four thousand, four hundred twenty-five".