4001279 has 4 divisors (see below), whose sum is σ = 4094376. Its totient is φ = 3908184.

The previous prime is 4001269. The next prime is 4001303. The reversal of 4001279 is 9721004.

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

It is a de Polignac number, because none of the positive numbers 2^k-4001279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4001219) 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, 46484 + ... + 46569.

It is an arithmetic number, because the mean of its divisors is an integer number (1023594).

Almost surely, 2^4001279 is an apocalyptic number.

4001279 is a deficient number, since it is larger than the sum of its proper divisors (93097).

4001279 is an equidigital number, since it uses as much as digits as its factorization.

4001279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93096.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 4001279 is about 2000.3197244441. The cubic root of 4001279 is about 158.7570224434.

The spelling of 4001279 in words is "four million, one thousand, two hundred seventy-nine".