249256901 has 8 divisors (see below), whose sum is σ = 257064984. Its totient is φ = 241505280.

The previous prime is 249256897. The next prime is 249256913. The reversal of 249256901 is 109652942.

It can be written as a sum of positive squares in 4 ways, for example, as 197402500 + 51854401 = 14050^2 + 7201^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 249256901 - 2² = 249256897 is a prime.

It is a super-2 number, since 2×249256901² = 124258005392247602, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249256961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5060 + ... + 22893.

It is an arithmetic number, because the mean of its divisors is an integer number (32133123).

Almost surely, 2^249256901 is an apocalyptic number.

It is an amenable number.

249256901 is a deficient number, since it is larger than the sum of its proper divisors (7808083).

249256901 is a wasteful number, since it uses less digits than its factorization.

249256901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28231.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 249256901 is about 15787.8719591970. The cubic root of 249256901 is about 629.3357414551.

The spelling of 249256901 in words is "two hundred forty-nine million, two hundred fifty-six thousand, nine hundred one".