2101634 has 4 divisors (see below), whose sum is σ = 3152454. Its totient is φ = 1050816.

The previous prime is 2101621. The next prime is 2101651. The reversal of 2101634 is 4361012.

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

It can be written as a sum of positive squares in only one way, i.e., 1968409 + 133225 = 1403^2 + 365^2 .

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525407 + ... + 525410.

2^2101634 is an apocalyptic number.

2101634 is a deficient number, since it is larger than the sum of its proper divisors (1050820).

2101634 is a wasteful number, since it uses less digits than its factorization.

2101634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050819.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2101634 is about 1449.7013485542. The cubic root of 2101634 is about 128.0911216397.

Adding to 2101634 its reverse (4361012), we get a palindrome (6462646).

The spelling of 2101634 in words is "two million, one hundred one thousand, six hundred thirty-four".