145831072 has 24 divisors (see below), whose sum is σ = 289953972. Its totient is φ = 72192000.

The previous prime is 145831027. The next prime is 145831123. The reversal of 145831072 is 270138541.

It can be written as a sum of positive squares in 2 ways, for example, as 145829776 + 1296 = 12076^2 + 36^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19329 + ... + 25792.

Almost surely, 2^145831072 is an apocalyptic number.

It is an amenable number.

145831072 is a deficient number, since it is larger than the sum of its proper divisors (144122900).

145831072 is a wasteful number, since it uses less digits than its factorization.

145831072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45232 (or 45224 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 145831072 is about 12076.0536600331. The cubic root of 145831072 is about 526.3605791441.

The spelling of 145831072 in words is "one hundred forty-five million, eight hundred thirty-one thousand, seventy-two".