258171945 has 16 divisors (see below), whose sum is σ = 437374080. Its totient is φ = 129592064.

The previous prime is 258171923. The next prime is 258171961. The reversal of 258171945 is 549171852.

258171945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 258171945 - 2¹¹ = 258169897 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 258171897 and 258171906.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 505965 + ... + 506474.

It is an arithmetic number, because the mean of its divisors is an integer number (27335880).

Almost surely, 2^258171945 is an apocalyptic number.

It is an amenable number.

258171945 is a deficient number, since it is larger than the sum of its proper divisors (179202135).

258171945 is a wasteful number, since it uses less digits than its factorization.

258171945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012464.

The product of its digits is 100800, while the sum is 42.

The square root of 258171945 is about 16067.7299267818. The cubic root of 258171945 is about 636.7510682157.

The spelling of 258171945 in words is "two hundred fifty-eight million, one hundred seventy-one thousand, nine hundred forty-five".