249129845 has 16 divisors (see below), whose sum is σ = 306270720. Its totient is φ = 194454144.

The previous prime is 249129833. The next prime is 249129851. The reversal of 249129845 is 548921942.

It is a cyclic number.

It is not a de Polignac number, because 249129845 - 2²⁴ = 232352629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 249129796 and 249129805.

It is a congruent number.

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, 82889 + ... + 85841.

It is an arithmetic number, because the mean of its divisors is an integer number (19141920).

Almost surely, 2^249129845 is an apocalyptic number.

It is an amenable number.

249129845 is a deficient number, since it is larger than the sum of its proper divisors (57140875).

249129845 is a wasteful number, since it uses less digits than its factorization.

249129845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3364.

The product of its digits is 207360, while the sum is 44.

The square root of 249129845 is about 15783.8475980985. The cubic root of 249129845 is about 629.2287909262.

The spelling of 249129845 in words is "two hundred forty-nine million, one hundred twenty-nine thousand, eight hundred forty-five".