21134258 has 8 divisors (see below), whose sum is σ = 31721628. Its totient is φ = 10560384.

The previous prime is 21134249. The next prime is 21134273. The reversal of 21134258 is 85243112.

It can be written as a sum of positive squares in 2 ways, for example, as 21132409 + 1849 = 4597^2 + 43^2 .

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

It is a super-2 number, since 2×21134258² = 893313722421128, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 2810 + ... + 7082.

Almost surely, 2^21134258 is an apocalyptic number.

21134258 is a deficient number, since it is larger than the sum of its proper divisors (10587370).

21134258 is a wasteful number, since it uses less digits than its factorization.

21134258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6748.

The product of its digits is 1920, while the sum is 26.

The square root of 21134258 is about 4597.2011050203. The cubic root of 21134258 is about 276.4791177425.

The spelling of 21134258 in words is "twenty-one million, one hundred thirty-four thousand, two hundred fifty-eight".