145561458 has 48 divisors (see below), whose sum is σ = 342519840. Its totient is φ = 41114304.

The previous prime is 145561447. The next prime is 145561477. The reversal of 145561458 is 854165541.

145561458 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23385 + ... + 28947.

It is an arithmetic number, because the mean of its divisors is an integer number (7135830).

Almost surely, 2^145561458 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145561458, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171259920).

145561458 is an abundant number, since it is smaller than the sum of its proper divisors (196958382).

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

145561458 is a wasteful number, since it uses less digits than its factorization.

145561458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5671 (or 5664 counting only the distinct ones).

The product of its digits is 96000, while the sum is 39.

The square root of 145561458 is about 12064.8853289205. The cubic root of 145561458 is about 526.0359987314.

The spelling of 145561458 in words is "one hundred forty-five million, five hundred sixty-one thousand, four hundred fifty-eight".