2139552 has 144 divisors (see below), whose sum is σ = 7076160. Its totient is φ = 608256.

The previous prime is 2139541. The next prime is 2139563. The reversal of 2139552 is 2559312.

It is an interprime number because it is at equal distance from previous prime (2139541) and next prime (2139563).

It is a tau number, because it is divible by the number of its divisors (144).

Its product of digits (2700) is a multiple of the sum of its prime factors (75).

It is a nialpdrome in base 12.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93013 + ... + 93035.

It is an arithmetic number, because the mean of its divisors is an integer number (49140).

2^2139552 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 2139552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3538080).

2139552 is an abundant number, since it is smaller than the sum of its proper divisors (4936608).

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

2139552 is a wasteful number, since it uses less digits than its factorization.

2139552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75 (or 64 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 2139552 is about 1462.7207525704. The cubic root of 2139552 is about 128.8568811170.

The spelling of 2139552 in words is "two million, one hundred thirty-nine thousand, five hundred fifty-two".