165869742 has 16 divisors (see below), whose sum is σ = 340705872. Its totient is φ = 53795520.

The previous prime is 165869741. The next prime is 165869761. The reversal of 165869742 is 247968561.

It is a super-2 number, since 2×165869742² = 55025542622293128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 165869691 and 165869700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165869741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 373359 + ... + 373802.

It is an arithmetic number, because the mean of its divisors is an integer number (21294117).

Almost surely, 2^165869742 is an apocalyptic number.

165869742 is an abundant number, since it is smaller than the sum of its proper divisors (174836130).

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

165869742 is a wasteful number, since it uses less digits than its factorization.

165869742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747203.

The product of its digits is 725760, while the sum is 48.

The square root of 165869742 is about 12879.0427439309. The cubic root of 165869742 is about 549.4426773212.

The spelling of 165869742 in words is "one hundred sixty-five million, eight hundred sixty-nine thousand, seven hundred forty-two".