145047172 has 24 divisors (see below), whose sum is σ = 257300120. Its totient is φ = 71539200.

The previous prime is 145047169. The next prime is 145047173. The reversal of 145047172 is 271740541.

It can be written as a sum of positive squares in 4 ways, for example, as 470596 + 144576576 = 686^2 + 12024^2 .

It is not an unprimeable number, because it can be changed into a prime (145047173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120172 + ... + 121372.

Almost surely, 2^145047172 is an apocalyptic number.

It is an amenable number.

145047172 is a deficient number, since it is larger than the sum of its proper divisors (112252948).

145047172 is a wasteful number, since it uses less digits than its factorization.

145047172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1591 (or 1589 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 145047172 is about 12043.5531302021. The cubic root of 145047172 is about 525.4157517040.

The spelling of 145047172 in words is "one hundred forty-five million, forty-seven thousand, one hundred seventy-two".