249470401 has 4 divisors (see below), whose sum is σ = 249520852. Its totient is φ = 249419952.

The previous prime is 249470341. The next prime is 249470411. The reversal of 249470401 is 104074942.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104074942 = 2 ⋅52037471.

It can be written as a sum of positive squares in 2 ways, for example, as 192543376 + 56927025 = 13876^2 + 7545^2 .

It is a cyclic number.

It is not a de Polignac number, because 249470401 - 2⁹ = 249469889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249470411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16890 + ... + 28003.

It is an arithmetic number, because the mean of its divisors is an integer number (62380213).

Almost surely, 2^249470401 is an apocalyptic number.

It is an amenable number.

249470401 is a deficient number, since it is larger than the sum of its proper divisors (50451).

249470401 is an equidigital number, since it uses as much as digits as its factorization.

249470401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50450.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 249470401 is about 15794.6320311681. The cubic root of 249470401 is about 629.5153751794.

The spelling of 249470401 in words is "two hundred forty-nine million, four hundred seventy thousand, four hundred one".