2161534 has 4 divisors (see below), whose sum is σ = 3242304. Its totient is φ = 1080766.

The previous prime is 2161513. The next prime is 2161553. The reversal of 2161534 is 4351612.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540382 + ... + 540385.

It is an arithmetic number, because the mean of its divisors is an integer number (810576).

2^2161534 is an apocalyptic number.

2161534 is a deficient number, since it is larger than the sum of its proper divisors (1080770).

2161534 is a wasteful number, since it uses less digits than its factorization.

2161534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080769.

The product of its digits is 720, while the sum is 22.

The square root of 2161534 is about 1470.2156304434. The cubic root of 2161534 is about 129.2966751126.

The spelling of 2161534 in words is "two million, one hundred sixty-one thousand, five hundred thirty-four".