21265514 has 4 divisors (see below), whose sum is σ = 31898274. Its totient is φ = 10632756.

The previous prime is 21265459. The next prime is 21265523. The reversal of 21265514 is 41556212.

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

It can be written as a sum of positive squares in only one way, i.e., 19509889 + 1755625 = 4417^2 + 1325^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5316377 + ... + 5316380.

Almost surely, 2^21265514 is an apocalyptic number.

21265514 is a deficient number, since it is larger than the sum of its proper divisors (10632760).

21265514 is a wasteful number, since it uses less digits than its factorization.

21265514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10632759.

The product of its digits is 2400, while the sum is 26.

The square root of 21265514 is about 4611.4546511920. The cubic root of 21265514 is about 277.0503021334.

The spelling of 21265514 in words is "twenty-one million, two hundred sixty-five thousand, five hundred fourteen".