2139456 has 56 divisors (see below), whose sum is σ = 6181344. Its totient is φ = 647680.

The previous prime is 2139427. The next prime is 2139461. The reversal of 2139456 is 6549312.

It is a d-powerful number, because it can be written as 2¹³ + 1 + 3¹¹ + 9³ + 4⁴ + 5⁹ + 6 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1606 + ... + 2618.

2^2139456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2139456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3090672).

2139456 is an abundant number, since it is smaller than the sum of its proper divisors (4041888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2139456 is a wasteful number, since it uses less digits than its factorization.

2139456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039 (or 1029 counting only the distinct ones).

The product of its digits is 6480, while the sum is 30.

The square root of 2139456 is about 1462.6879366427. The cubic root of 2139456 is about 128.8549538529.

It can be divided in two parts, 213 and 9456, that added together give a palindrome (9669).

The spelling of 2139456 in words is "two million, one hundred thirty-nine thousand, four hundred fifty-six".