145921980 has 48 divisors (see below), whose sum is σ = 414691200. Its totient is φ = 38330688.

The previous prime is 145921973. The next prime is 145921987. The reversal of 145921980 is 89129541.

It is an interprime number because it is at equal distance from previous prime (145921973) and next prime (145921987).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145921987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14130 + ... + 22169.

It is an arithmetic number, because the mean of its divisors is an integer number (8639400).

Almost surely, 2^145921980 is an apocalyptic number.

145921980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145921980 is an abundant number, since it is smaller than the sum of its proper divisors (268769220).

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

145921980 is a wasteful number, since it uses less digits than its factorization.

145921980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36378 (or 36376 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 145921980 is about 12079.8170515948. The cubic root of 145921980 is about 526.4699304351.

The spelling of 145921980 in words is "one hundred forty-five million, nine hundred twenty-one thousand, nine hundred eighty".