2121494 has 4 divisors (see below), whose sum is σ = 3182244. Its totient is φ = 1060746.

The previous prime is 2121479. The next prime is 2121503. The reversal of 2121494 is 4941212.

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

It is an Ulam number.

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

It is a Curzon number.

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, 530372 + ... + 530375.

It is an arithmetic number, because the mean of its divisors is an integer number (795561).

2^2121494 is an apocalyptic number.

2121494 is a deficient number, since it is larger than the sum of its proper divisors (1060750).

2121494 is a wasteful number, since it uses less digits than its factorization.

2121494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060749.

The product of its digits is 576, while the sum is 23.

The square root of 2121494 is about 1456.5349292070. The cubic root of 2121494 is about 128.4933354101.

The spelling of 2121494 in words is "two million, one hundred twenty-one thousand, four hundred ninety-four".