161420524 has 12 divisors (see below), whose sum is σ = 284548824. Its totient is φ = 80120864.

The previous prime is 161420477. The next prime is 161420531. The reversal of 161420524 is 425024161.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146734 + ... + 147829.

It is an arithmetic number, because the mean of its divisors is an integer number (23712402).

Almost surely, 2^161420524 is an apocalyptic number.

It is an amenable number.

161420524 is a deficient number, since it is larger than the sum of its proper divisors (123128300).

161420524 is a wasteful number, since it uses less digits than its factorization.

161420524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294704 (or 294702 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 161420524 is about 12705.1377009460. The cubic root of 161420524 is about 544.4854150235.

Adding to 161420524 its reverse (425024161), we get a palindrome (586444685).

The spelling of 161420524 in words is "one hundred sixty-one million, four hundred twenty thousand, five hundred twenty-four".