21412502 has 8 divisors (see below), whose sum is σ = 32163456. Its totient is φ = 10691352.

The previous prime is 21412499. The next prime is 21412513. The reversal of 21412502 is 20521412.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5558 + ... + 8585.

It is an arithmetic number, because the mean of its divisors is an integer number (4020432).

Almost surely, 2^21412502 is an apocalyptic number.

21412502 is a deficient number, since it is larger than the sum of its proper divisors (10750954).

21412502 is a wasteful number, since it uses less digits than its factorization.

21412502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14902.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 21412502 is about 4627.3644766757. The cubic root of 21412502 is about 277.6871642695.

Adding to 21412502 its reverse (20521412), we get a palindrome (41933914).

The spelling of 21412502 in words is "twenty-one million, four hundred twelve thousand, five hundred two".