21076461 has 12 divisors (see below), whose sum is σ = 34792992. Its totient is φ = 12043656.

The previous prime is 21076427. The next prime is 21076463. The reversal of 21076461 is 16467012.

21076461 is a `hidden beast` number, since 2 + 10 + 7 + 646 + 1 = 666.

It is not a de Polignac number, because 21076461 - 2⁶ = 21076397 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21076463) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 167211 + ... + 167336.

It is an arithmetic number, because the mean of its divisors is an integer number (2899416).

Almost surely, 2^21076461 is an apocalyptic number.

21076461 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21076461 is a deficient number, since it is larger than the sum of its proper divisors (13716531).

21076461 is a wasteful number, since it uses less digits than its factorization.

21076461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334560 (or 334557 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 21076461 is about 4590.9106939691. The cubic root of 21076461 is about 276.2268535031.

The spelling of 21076461 in words is "twenty-one million, seventy-six thousand, four hundred sixty-one".