161125541 has 16 divisors (see below), whose sum is σ = 175011840. Its totient is φ = 147759360.

The previous prime is 161125469. The next prime is 161125577. The reversal of 161125541 is 145521161.

It is a cyclic number.

It is not a de Polignac number, because 161125541 - 2¹⁰ = 161124517 is a prime.

It is a super-2 number, since 2×161125541² = 51922879925085362, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161125541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161125841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 336140 + ... + 336618.

It is an arithmetic number, because the mean of its divisors is an integer number (10938240).

Almost surely, 2^161125541 is an apocalyptic number.

It is an amenable number.

161125541 is a deficient number, since it is larger than the sum of its proper divisors (13886299).

161125541 is a wasteful number, since it uses less digits than its factorization.

161125541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964.

The product of its digits is 1200, while the sum is 26.

The square root of 161125541 is about 12693.5235848837. The cubic root of 161125541 is about 544.1535450460.

The spelling of 161125541 in words is "one hundred sixty-one million, one hundred twenty-five thousand, five hundred forty-one".