2139534 has 40 divisors (see below), whose sum is σ = 4913568. Its totient is φ = 695520.

The previous prime is 2139521. The next prime is 2139539. The reversal of 2139534 is 4359312.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2139498 and 2139507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139539) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7474 + ... + 7754.

2^2139534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2139534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2456784).

2139534 is an abundant number, since it is smaller than the sum of its proper divisors (2774034).

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

2139534 is a wasteful number, since it uses less digits than its factorization.

2139534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342 (or 333 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 2139534 is about 1462.7145996400. The cubic root of 2139534 is about 128.8565197594.

The spelling of 2139534 in words is "two million, one hundred thirty-nine thousand, five hundred thirty-four".