145397020 has 48 divisors (see below), whose sum is σ = 315524160. Its totient is φ = 56249856.

The previous prime is 145397009. The next prime is 145397041. The reversal of 145397020 is 20793541.

It is a super-2 number, since 2×145397020² = 42280586849760800, which contains 22 as substring.

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, 76441 + ... + 78319.

It is an arithmetic number, because the mean of its divisors is an integer number (6573420).

Almost surely, 2^145397020 is an apocalyptic number.

145397020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145397020 is an abundant number, since it is smaller than the sum of its proper divisors (170127140).

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

145397020 is a wasteful number, since it uses less digits than its factorization.

145397020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2014 (or 2012 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 145397020 is about 12058.0686679086. The cubic root of 145397020 is about 525.8378398190.

The spelling of 145397020 in words is "one hundred forty-five million, three hundred ninety-seven thousand, twenty".