145254220 has 24 divisors (see below), whose sum is σ = 314875008. Its totient is φ = 56227200.

The previous prime is 145254203. The next prime is 145254227. The reversal of 145254220 is 22452541.

It is not an unprimeable number, because it can be changed into a prime (145254227) 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, 116521 + ... + 117760.

It is an arithmetic number, because the mean of its divisors is an integer number (13119792).

Almost surely, 2^145254220 is an apocalyptic number.

145254220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145254220 is an abundant number, since it is smaller than the sum of its proper divisors (169620788).

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

145254220 is a wasteful number, since it uses less digits than its factorization.

145254220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234321 (or 234319 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 145254220 is about 12052.1458670230. The cubic root of 145254220 is about 525.6656349147.

The spelling of 145254220 in words is "one hundred forty-five million, two hundred fifty-four thousand, two hundred twenty".