145631745 has 48 divisors (see below), whose sum is σ = 301047552. Its totient is φ = 63676800.

The previous prime is 145631743. The next prime is 145631753. The reversal of 145631745 is 547136541.

145631745 is a `hidden beast` number, since 14 + 5 + 631 + 7 + 4 + 5 = 666.

It is not a de Polignac number, because 145631745 - 2¹ = 145631743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145631743) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2806 + ... + 17295.

It is an arithmetic number, because the mean of its divisors is an integer number (6271824).

Almost surely, 2^145631745 is an apocalyptic number.

145631745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

145631745 is an abundant number, since it is smaller than the sum of its proper divisors (155415807).

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

145631745 is a wasteful number, since it uses less digits than its factorization.

145631745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20142 (or 20139 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 145631745 is about 12067.7978521352. The cubic root of 145631745 is about 526.1206537933.

The spelling of 145631745 in words is "one hundred forty-five million, six hundred thirty-one thousand, seven hundred forty-five".