249040625 has 12 divisors (see below), whose sum is σ = 311284764. Its totient is φ = 199230000.

The previous prime is 249040621. The next prime is 249040637. The reversal of 249040625 is 526040942.

It can be written as a sum of positive squares in 6 ways, for example, as 126540001 + 122500624 = 11249^2 + 11068^2 .

It is not a de Polignac number, because 249040625 - 2² = 249040621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 249040591 and 249040600.

It is not an unprimeable number, because it can be changed into a prime (249040621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36722 + ... + 42971.

It is an arithmetic number, because the mean of its divisors is an integer number (25940397).

Almost surely, 2^249040625 is an apocalyptic number.

249040625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

249040625 is a deficient number, since it is larger than the sum of its proper divisors (62244139).

249040625 is an frugal number, since it uses more digits than its factorization.

249040625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79718 (or 79698 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 249040625 is about 15781.0210379430. The cubic root of 249040625 is about 629.1536674556.

The spelling of 249040625 in words is "two hundred forty-nine million, forty thousand, six hundred twenty-five".