21126702 has 8 divisors (see below), whose sum is σ = 42253416. Its totient is φ = 7042232.

The previous prime is 21126691. The next prime is 21126709. The reversal of 21126702 is 20762112.

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

21126702 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21126709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1760553 + ... + 1760564.

It is an arithmetic number, because the mean of its divisors is an integer number (5281677).

Almost surely, 2^21126702 is an apocalyptic number.

21126702 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21126702 is a wasteful number, since it uses less digits than its factorization.

21126702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3521122.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 21126702 is about 4596.3792271744. The cubic root of 21126702 is about 276.4461645278.

Adding to 21126702 its reverse (20762112), we get a palindrome (41888814).

The spelling of 21126702 in words is "twenty-one million, one hundred twenty-six thousand, seven hundred two".