2121699 has 8 divisors (see below), whose sum is σ = 2877120. Its totient is φ = 1390376.

The previous prime is 2121683. The next prime is 2121737. The reversal of 2121699 is 9961212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2121699 - 2⁴ = 2121683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5817 + ... + 6170.

It is an arithmetic number, because the mean of its divisors is an integer number (359640).

2^2121699 is an apocalyptic number.

2121699 is a deficient number, since it is larger than the sum of its proper divisors (755421).

2121699 is a wasteful number, since it uses less digits than its factorization.

2121699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12049.

The product of its digits is 1944, while the sum is 30.

The square root of 2121699 is about 1456.6053000041. The cubic root of 2121699 is about 128.4974740479.

The spelling of 2121699 in words is "two million, one hundred twenty-one thousand, six hundred ninety-nine".