2138534 has 4 divisors (see below), whose sum is σ = 3207804. Its totient is φ = 1069266.

The previous prime is 2138531. The next prime is 2138537. The reversal of 2138534 is 4358312.

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

It is an interprime number because it is at equal distance from previous prime (2138531) and next prime (2138537).

It is an Ulam number.

It is a d-powerful number, because it can be written as 2 + 1 + 3⁷ + 8⁷ + 5⁵ + 3⁹ + 4⁷ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 534632 + ... + 534635.

It is an arithmetic number, because the mean of its divisors is an integer number (801951).

2^2138534 is an apocalyptic number.

2138534 is a deficient number, since it is larger than the sum of its proper divisors (1069270).

2138534 is a wasteful number, since it uses less digits than its factorization.

2138534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069269.

The product of its digits is 2880, while the sum is 26.

The square root of 2138534 is about 1462.3727295050. The cubic root of 2138534 is about 128.8364411503.

The spelling of 2138534 in words is "two million, one hundred thirty-eight thousand, five hundred thirty-four".