245260139 has 6 divisors (see below), whose sum is σ = 260536164. Its totient is φ = 230832800.

The previous prime is 245260117. The next prime is 245260153. The reversal of 245260139 is 931062542.

It is a happy number.

It is not a de Polignac number, because 245260139 - 2¹² = 245256043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245260159) 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 5 ways as a sum of consecutive naturals, for example, 424037 + ... + 424614.

It is an arithmetic number, because the mean of its divisors is an integer number (43422694).

Almost surely, 2^245260139 is an apocalyptic number.

245260139 is a deficient number, since it is larger than the sum of its proper divisors (15276025).

245260139 is an equidigital number, since it uses as much as digits as its factorization.

245260139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848685 (or 848668 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 245260139 is about 15660.7834733771. The cubic root of 245260139 is about 625.9538621081.

The spelling of 245260139 in words is "two hundred forty-five million, two hundred sixty thousand, one hundred thirty-nine".