161520126 has 32 divisors (see below), whose sum is σ = 331393920. Its totient is φ = 52454304.

The previous prime is 161520091. The next prime is 161520127. The reversal of 161520126 is 621025161.

It is a super-2 number, since 2×161520126² = 52177502206111752, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161520096 and 161520105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161520127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182481 + ... + 183363.

It is an arithmetic number, because the mean of its divisors is an integer number (10356060).

Almost surely, 2^161520126 is an apocalyptic number.

161520126 is an abundant number, since it is smaller than the sum of its proper divisors (169873794).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161520126 is a wasteful number, since it uses less digits than its factorization.

161520126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 161520126 is about 12709.0568493496. The cubic root of 161520126 is about 544.5973807233.

Adding to 161520126 its reverse (621025161), we get a palindrome (782545287).

The spelling of 161520126 in words is "one hundred sixty-one million, five hundred twenty thousand, one hundred twenty-six".