21062495 has 8 divisors (see below), whose sum is σ = 25580016. Its totient is φ = 16646656.

The previous prime is 21062453. The next prime is 21062513. The reversal of 21062495 is 59426012.

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 21062495 - 2¹⁰ = 21061471 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 24962 + ... + 25791.

It is an arithmetic number, because the mean of its divisors is an integer number (3197502).

Almost surely, 2^21062495 is an apocalyptic number.

21062495 is a deficient number, since it is larger than the sum of its proper divisors (4517521).

21062495 is an equidigital number, since it uses as much as digits as its factorization.

21062495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50841.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 21062495 is about 4589.3893929367. The cubic root of 21062495 is about 276.1658274980.

The spelling of 21062495 in words is "twenty-one million, sixty-two thousand, four hundred ninety-five".