145831020 has 96 divisors (see below), whose sum is σ = 417590208. Its totient is φ = 38019072.

The previous prime is 145831013. The next prime is 145831027. The reversal of 145831020 is 20138541.

It is an interprime number because it is at equal distance from previous prime (145831013) and next prime (145831027).

It is not an unprimeable number, because it can be changed into a prime (145831027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 928782 + ... + 928938.

It is an arithmetic number, because the mean of its divisors is an integer number (4349898).

Almost surely, 2^145831020 is an apocalyptic number.

145831020 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 145831020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208795104).

145831020 is an abundant number, since it is smaller than the sum of its proper divisors (271759188).

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

145831020 is a wasteful number, since it uses less digits than its factorization.

145831020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419 (or 417 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 145831020 is about 12076.0515070117. The cubic root of 145831020 is about 526.3605165814.

Adding to 145831020 its reverse (20138541), we get a palindrome (165969561).

The spelling of 145831020 in words is "one hundred forty-five million, eight hundred thirty-one thousand, twenty".