21214059 has 4 divisors (see below), whose sum is σ = 28285416. Its totient is φ = 14142704.

The previous prime is 21214049. The next prime is 21214087. The reversal of 21214059 is 95041212.

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

It is a cyclic number.

It is not a de Polignac number, because 21214059 - 2⁷ = 21213931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21214049) 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, 3535674 + ... + 3535679.

It is an arithmetic number, because the mean of its divisors is an integer number (7071354).

Almost surely, 2^21214059 is an apocalyptic number.

21214059 is a deficient number, since it is larger than the sum of its proper divisors (7071357).

21214059 is an equidigital number, since it uses as much as digits as its factorization.

21214059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7071356.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 21214059 is about 4605.8722300993. The cubic root of 21214059 is about 276.8266671811.

The spelling of 21214059 in words is "twenty-one million, two hundred fourteen thousand, fifty-nine".