249542481 has 4 divisors (see below), whose sum is σ = 332723312. Its totient is φ = 166361652.

The previous prime is 249542471. The next prime is 249542483. The reversal of 249542481 is 184245942.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 249542481 - 2²¹ = 247445329 is a prime.

It is a super-2 number, since 2×249542481² = 124542899647270722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249542483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41590411 + ... + 41590416.

It is an arithmetic number, because the mean of its divisors is an integer number (83180828).

Almost surely, 2^249542481 is an apocalyptic number.

It is an amenable number.

249542481 is a deficient number, since it is larger than the sum of its proper divisors (83180831).

249542481 is an equidigital number, since it uses as much as digits as its factorization.

249542481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83180830.

The product of its digits is 92160, while the sum is 39.

The square root of 249542481 is about 15796.9136542554. The cubic root of 249542481 is about 629.5759984018.

The spelling of 249542481 in words is "two hundred forty-nine million, five hundred forty-two thousand, four hundred eighty-one".