4288139421 has 4 divisors (see below), whose sum is σ = 5717519232. Its totient is φ = 2858759612.

The previous prime is 4288139419. The next prime is 4288139441. The reversal of 4288139421 is 1249318824.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4288139421 - 2¹ = 4288139419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4288139441) 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, 714689901 + ... + 714689906.

It is an arithmetic number, because the mean of its divisors is an integer number (1429379808).

Almost surely, 2^4288139421 is an apocalyptic number.

It is an amenable number.

4288139421 is a deficient number, since it is larger than the sum of its proper divisors (1429379811).

4288139421 is a wasteful number, since it uses less digits than its factorization.

4288139421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1429379810.

The product of its digits is 110592, while the sum is 42.

The square root of 4288139421 is about 65483.8867279577. The cubic root of 4288139421 is about 1624.6368477330.

The spelling of 4288139421 in words is "four billion, two hundred eighty-eight million, one hundred thirty-nine thousand, four hundred twenty-one".