405250139 has 12 divisors (see below), whose sum is σ = 471756168. Its totient is φ = 347104800.

The previous prime is 405250123. The next prime is 405250217. The reversal of 405250139 is 931052504.

It is not a de Polignac number, because 405250139 - 2⁴ = 405250123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405250039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102479 + ... + 106359.

It is an arithmetic number, because the mean of its divisors is an integer number (39313014).

Almost surely, 2^405250139 is an apocalyptic number.

405250139 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

405250139 is a deficient number, since it is larger than the sum of its proper divisors (66506029).

405250139 is a wasteful number, since it uses less digits than its factorization.

405250139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6026 (or 6019 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 405250139 is about 20130.8255916145. The cubic root of 405250139 is about 740.0159109070.

The spelling of 405250139 in words is "four hundred five million, two hundred fifty thousand, one hundred thirty-nine".