249749546 has 8 divisors (see below), whose sum is σ = 375118884. Its totient is φ = 124709920.

The previous prime is 249749531. The next prime is 249749551. The reversal of 249749546 is 645947942.

It can be written as a sum of positive squares in 2 ways, for example, as 216237025 + 33512521 = 14705^2 + 5789^2 .

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

It is a super-2 number, since 2×249749546² = 124749671454412232, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 249749494 and 249749503.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80525 + ... + 83568.

Almost surely, 2^249749546 is an apocalyptic number.

249749546 is a deficient number, since it is larger than the sum of its proper divisors (125369338).

249749546 is a wasteful number, since it uses less digits than its factorization.

249749546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164856.

The product of its digits is 2177280, while the sum is 50.

The square root of 249749546 is about 15803.4662653482. The cubic root of 249749546 is about 629.7500864805.

The spelling of 249749546 in words is "two hundred forty-nine million, seven hundred forty-nine thousand, five hundred forty-six".