145774172 has 6 divisors (see below), whose sum is σ = 255104808. Its totient is φ = 72887084.

The previous prime is 145774169. The next prime is 145774177. The reversal of 145774172 is 271477541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145774177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18221768 + ... + 18221775.

It is an arithmetic number, because the mean of its divisors is an integer number (42517468).

Almost surely, 2^145774172 is an apocalyptic number.

It is an amenable number.

145774172 is a deficient number, since it is larger than the sum of its proper divisors (109330636).

145774172 is a wasteful number, since it uses less digits than its factorization.

145774172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36443547 (or 36443545 counting only the distinct ones).

The product of its digits is 54880, while the sum is 38.

The square root of 145774172 is about 12073.6975280980. The cubic root of 145774172 is about 526.2921122240.

The spelling of 145774172 in words is "one hundred forty-five million, seven hundred seventy-four thousand, one hundred seventy-two".