4257139 has 8 divisors (see below), whose sum is σ = 4465152. Its totient is φ = 4051080.

The previous prime is 4257133. The next prime is 4257161. The reversal of 4257139 is 9317524.

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

It is a cyclic number.

It is not a de Polignac number, because 4257139 - 2³ = 4257131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4257139.

It is not an unprimeable number, because it can be changed into a prime (4257131) 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, 5892 + ... + 6574.

It is an arithmetic number, because the mean of its divisors is an integer number (558144).

Almost surely, 2^4257139 is an apocalyptic number.

4257139 is a deficient number, since it is larger than the sum of its proper divisors (208013).

4257139 is a wasteful number, since it uses less digits than its factorization.

4257139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977.

The product of its digits is 7560, while the sum is 31.

The square root of 4257139 is about 2063.2835481339. The cubic root of 4257139 is about 162.0712357544.

The spelling of 4257139 in words is "four million, two hundred fifty-seven thousand, one hundred thirty-nine".