249270145 has 8 divisors (see below), whose sum is σ = 299220480. Its totient is φ = 199351920.

The previous prime is 249270061. The next prime is 249270169. The reversal of 249270145 is 541072942.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 249270145 - 2⁹ = 249269633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 249270145.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15136 + ... + 26974.

It is an arithmetic number, because the mean of its divisors is an integer number (37402560).

Almost surely, 2^249270145 is an apocalyptic number.

It is an amenable number.

249270145 is a deficient number, since it is larger than the sum of its proper divisors (49950335).

249270145 is a wasteful number, since it uses less digits than its factorization.

249270145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16055.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 249270145 is about 15788.2913895076. The cubic root of 249270145 is about 629.3468876192.

The spelling of 249270145 in words is "two hundred forty-nine million, two hundred seventy thousand, one hundred forty-five".