145973745 has 48 divisors (see below), whose sum is σ = 263914560. Its totient is φ = 77402304.

The previous prime is 145973743. The next prime is 145973749. The reversal of 145973745 is 547379541.

145973745 is a `hidden beast` number, since 14 + 597 + 3 + 7 + 45 = 666.

145973745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 145973745 - 2¹ = 145973743 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 145973745.

It is not an unprimeable number, because it can be changed into a prime (145973741) 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, 384966 + ... + 385344.

It is an arithmetic number, because the mean of its divisors is an integer number (5498220).

Almost surely, 2^145973745 is an apocalyptic number.

145973745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

145973745 is a deficient number, since it is larger than the sum of its proper divisors (117940815).

145973745 is an equidigital number, since it uses as much as digits as its factorization.

145973745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716 (or 704 counting only the distinct ones).

The product of its digits is 529200, while the sum is 45.

The square root of 145973745 is about 12081.9594851166. The cubic root of 145973745 is about 526.5321771554.

The spelling of 145973745 in words is "one hundred forty-five million, nine hundred seventy-three thousand, seven hundred forty-five".