145378172 has 6 divisors (see below), whose sum is σ = 254411808. Its totient is φ = 72689084.

The previous prime is 145378133. The next prime is 145378199. The reversal of 145378172 is 271873541.

145378172 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×145378172³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18172268 + ... + 18172275.

It is an arithmetic number, because the mean of its divisors is an integer number (42401968).

Almost surely, 2^145378172 is an apocalyptic number.

It is an amenable number.

145378172 is a deficient number, since it is larger than the sum of its proper divisors (109033636).

145378172 is a wasteful number, since it uses less digits than its factorization.

145378172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36344547 (or 36344545 counting only the distinct ones).

The product of its digits is 47040, while the sum is 38.

The square root of 145378172 is about 12057.2870912158. The cubic root of 145378172 is about 525.8151171619.

The spelling of 145378172 in words is "one hundred forty-five million, three hundred seventy-eight thousand, one hundred seventy-two".