245991427 has 16 divisors (see below), whose sum is σ = 279946080. Its totient is φ = 215883360.

The previous prime is 245991413. The next prime is 245991443. The reversal of 245991427 is 724199542.

It is not a de Polignac number, because 245991427 - 2⁷ = 245991299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245991457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35413 + ... + 41785.

It is an arithmetic number, because the mean of its divisors is an integer number (17496630).

Almost surely, 2^245991427 is an apocalyptic number.

245991427 is a deficient number, since it is larger than the sum of its proper divisors (33954653).

245991427 is an equidigital number, since it uses as much as digits as its factorization.

245991427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6435 (or 6413 counting only the distinct ones).

The product of its digits is 181440, while the sum is 43.

The square root of 245991427 is about 15684.1138417190. The cubic root of 245991427 is about 626.5753768043.

The spelling of 245991427 in words is "two hundred forty-five million, nine hundred ninety-one thousand, four hundred twenty-seven".