145855420 has 24 divisors (see below), whose sum is σ = 319614624. Its totient is φ = 55805376.

The previous prime is 145855399. The next prime is 145855421. The reversal of 145855420 is 24558541.

It is a happy number.

145855420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145855421) 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, 158079 + ... + 158998.

It is an arithmetic number, because the mean of its divisors is an integer number (13317276).

Almost surely, 2^145855420 is an apocalyptic number.

145855420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145855420 is an abundant number, since it is smaller than the sum of its proper divisors (173759204).

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

145855420 is a wasteful number, since it uses less digits than its factorization.

145855420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317109 (or 317107 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 34.

The square root of 145855420 is about 12077.0617287484. The cubic root of 145855420 is about 526.3898712879.

The spelling of 145855420 in words is "one hundred forty-five million, eight hundred fifty-five thousand, four hundred twenty".