254280139 has 4 divisors (see below), whose sum is σ = 254460256. Its totient is φ = 254100024.

The previous prime is 254280077. The next prime is 254280151. The reversal of 254280139 is 931082452.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 254280139 - 2¹³ = 254271947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (254280239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87924 + ... + 90769.

It is an arithmetic number, because the mean of its divisors is an integer number (63615064).

Almost surely, 2^254280139 is an apocalyptic number.

254280139 is a deficient number, since it is larger than the sum of its proper divisors (180117).

254280139 is a wasteful number, since it uses less digits than its factorization.

254280139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180116.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 254280139 is about 15946.1637706378. The cubic root of 254280139 is about 633.5352927170.

The spelling of 254280139 in words is "two hundred fifty-four million, two hundred eighty thousand, one hundred thirty-nine".