165042420 has 24 divisors (see below), whose sum is σ = 462118944. Its totient is φ = 44011296.

The previous prime is 165042407. The next prime is 165042421. The reversal of 165042420 is 24240561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165042421) 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, 1375294 + ... + 1375413.

It is an arithmetic number, because the mean of its divisors is an integer number (19254956).

Almost surely, 2^165042420 is an apocalyptic number.

165042420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165042420 is an abundant number, since it is smaller than the sum of its proper divisors (297076524).

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

165042420 is a wasteful number, since it uses less digits than its factorization.

165042420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2750719 (or 2750717 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 165042420 is about 12846.8836688124. The cubic root of 165042420 is about 548.5276543459.

Adding to 165042420 its reverse (24240561), we get a palindrome (189282981).

The spelling of 165042420 in words is "one hundred sixty-five million, forty-two thousand, four hundred twenty".