165642126 has 16 divisors (see below), whose sum is σ = 356767824. Its totient is φ = 50966784.

The previous prime is 165642109. The next prime is 165642143. The reversal of 165642126 is 621246561.

It is an interprime number because it is at equal distance from previous prime (165642109) and next prime (165642143).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1061731 + ... + 1061886.

It is an arithmetic number, because the mean of its divisors is an integer number (22297989).

Almost surely, 2^165642126 is an apocalyptic number.

165642126 is an abundant number, since it is smaller than the sum of its proper divisors (191125698).

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

165642126 is a wasteful number, since it uses less digits than its factorization.

165642126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2123635.

The product of its digits is 17280, while the sum is 33.

The square root of 165642126 is about 12870.2030287016. The cubic root of 165642126 is about 549.1912366579.

Adding to 165642126 its reverse (621246561), we get a palindrome (786888687).

The spelling of 165642126 in words is "one hundred sixty-five million, six hundred forty-two thousand, one hundred twenty-six".