161420523 has 32 divisors (see below), whose sum is σ = 249696000. Its totient is φ = 91728000.

The previous prime is 161420477. The next prime is 161420531. The reversal of 161420523 is 325024161.

It is not a de Polignac number, because 161420523 - 2¹² = 161416427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161420493 and 161420502.

It is not an unprimeable number, because it can be changed into a prime (161420543) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62053 + ... + 64601.

It is an arithmetic number, because the mean of its divisors is an integer number (7803000).

Almost surely, 2^161420523 is an apocalyptic number.

161420523 is a deficient number, since it is larger than the sum of its proper divisors (88275477).

161420523 is a wasteful number, since it uses less digits than its factorization.

161420523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2683.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 161420523 is about 12705.1376615919. The cubic root of 161420523 is about 544.4854138991.

Adding to 161420523 its reverse (325024161), we get a palindrome (486444684).

The spelling of 161420523 in words is "one hundred sixty-one million, four hundred twenty thousand, five hundred twenty-three".