245724891 has 8 divisors (see below), whose sum is σ = 344877120. Its totient is φ = 155194632.

The previous prime is 245724889. The next prime is 245724901. The reversal of 245724891 is 198427542.

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

It is not a de Polignac number, because 245724891 - 2¹ = 245724889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (245724811) 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, 2155425 + ... + 2155538.

It is an arithmetic number, because the mean of its divisors is an integer number (43109640).

Almost surely, 2^245724891 is an apocalyptic number.

245724891 is a deficient number, since it is larger than the sum of its proper divisors (99152229).

245724891 is a wasteful number, since it uses less digits than its factorization.

245724891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4310985.

The product of its digits is 161280, while the sum is 42.

The square root of 245724891 is about 15675.6145334083. The cubic root of 245724891 is about 626.3489932394.

The spelling of 245724891 in words is "two hundred forty-five million, seven hundred twenty-four thousand, eight hundred ninety-one".