21167461 has 12 divisors (see below), whose sum is σ = 24706080. Its totient is φ = 18082680.

The previous prime is 21167423. The next prime is 21167467. The reversal of 21167461 is 16476112.

It is not a de Polignac number, because 21167461 - 2⁹ = 21166949 is a prime.

It is a super-2 number, since 2×21167461² = 896122810373042, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21167467) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20016 + ... + 21046.

It is an arithmetic number, because the mean of its divisors is an integer number (2058840).

Almost surely, 2^21167461 is an apocalyptic number.

It is an amenable number.

21167461 is a deficient number, since it is larger than the sum of its proper divisors (3538619).

21167461 is a wasteful number, since it uses less digits than its factorization.

21167461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1464 (or 1457 counting only the distinct ones).

The product of its digits is 2016, while the sum is 28.

The square root of 21167461 is about 4600.8109067859. The cubic root of 21167461 is about 276.6238295962.

The spelling of 21167461 in words is "twenty-one million, one hundred sixty-seven thousand, four hundred sixty-one".