21471126 has 16 divisors (see below), whose sum is σ = 43990128. Its totient is φ = 6982400.

The previous prime is 21471097. The next prime is 21471133. The reversal of 21471126 is 62117412.

It is a super-2 number, since 2×21471126² = 922018503415752, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21471096 and 21471105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43395 + ... + 43886.

It is an arithmetic number, because the mean of its divisors is an integer number (2749383).

Almost surely, 2^21471126 is an apocalyptic number.

21471126 is an abundant number, since it is smaller than the sum of its proper divisors (22519002).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21471126 is a wasteful number, since it uses less digits than its factorization.

21471126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87327.

The product of its digits is 672, while the sum is 24.

The square root of 21471126 is about 4633.6946381910. The cubic root of 21471126 is about 277.9403543345.

Adding to 21471126 its reverse (62117412), we get a palindrome (83588538).

The spelling of 21471126 in words is "twenty-one million, four hundred seventy-one thousand, one hundred twenty-six".