165451420 has 48 divisors (see below), whose sum is σ = 372391488. Its totient is φ = 61585920.

The previous prime is 165451393. The next prime is 165451469. The reversal of 165451420 is 24154561.

165451420 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12160 + ... + 21880.

It is an arithmetic number, because the mean of its divisors is an integer number (7758156).

Almost surely, 2^165451420 is an apocalyptic number.

165451420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165451420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186195744).

165451420 is an abundant number, since it is smaller than the sum of its proper divisors (206940068).

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

165451420 is a wasteful number, since it uses less digits than its factorization.

165451420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9790 (or 9788 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 165451420 is about 12862.7920763728. The cubic root of 165451420 is about 548.9803919770.

The spelling of 165451420 in words is "one hundred sixty-five million, four hundred fifty-one thousand, four hundred twenty".