21294267 has 8 divisors (see below), whose sum is σ = 28438080. Its totient is φ = 14173320.

The previous prime is 21294263. The next prime is 21294271. The reversal of 21294267 is 76249212.

It is an interprime number because it is at equal distance from previous prime (21294263) and next prime (21294271).

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

It is not a de Polignac number, because 21294267 - 2² = 21294263 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21294263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3409 + ... + 7362.

It is an arithmetic number, because the mean of its divisors is an integer number (3554760).

Almost surely, 2^21294267 is an apocalyptic number.

21294267 is a deficient number, since it is larger than the sum of its proper divisors (7143813).

21294267 is a wasteful number, since it uses less digits than its factorization.

21294267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11433.

The product of its digits is 12096, while the sum is 33.

The square root of 21294267 is about 4614.5711610073. The cubic root of 21294267 is about 277.1751120292.

The spelling of 21294267 in words is "twenty-one million, two hundred ninety-four thousand, two hundred sixty-seven".