249997065 has 16 divisors (see below), whose sum is σ = 400242048. Its totient is φ = 133249536.

The previous prime is 249997063. The next prime is 249997091. The reversal of 249997065 is 560799942.

It is not a de Polignac number, because 249997065 - 2¹ = 249997063 is a prime.

It is a super-2 number, since 2×249997065² = 124997065017228450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 249996999 and 249997017.

It is not an unprimeable number, because it can be changed into a prime (249997063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26124 + ... + 34386.

It is an arithmetic number, because the mean of its divisors is an integer number (25015128).

Almost surely, 2^249997065 is an apocalyptic number.

It is an amenable number.

249997065 is a deficient number, since it is larger than the sum of its proper divisors (150244983).

249997065 is a wasteful number, since it uses less digits than its factorization.

249997065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10288.

The product of its (nonzero) digits is 1224720, while the sum is 51.

The square root of 249997065 is about 15811.2954877202. The cubic root of 249997065 is about 629.9580596923.

The spelling of 249997065 in words is "two hundred forty-nine million, nine hundred ninety-seven thousand, sixty-five".