21412270 has 32 divisors (see below), whose sum is σ = 43190496. Its totient is φ = 7574400.

The previous prime is 21412267. The next prime is 21412273. The reversal of 21412270 is 7221412.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21412267) and next prime (21412273).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21412273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1440 + ... + 6700.

It is an arithmetic number, because the mean of its divisors is an integer number (1349703).

Almost surely, 2^21412270 is an apocalyptic number.

21412270 is an abundant number, since it is smaller than the sum of its proper divisors (21778226).

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

21412270 is a wasteful number, since it uses less digits than its factorization.

21412270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5316.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 21412270 is about 4627.3394083426. The cubic root of 21412270 is about 277.6861613717.

Adding to 21412270 its reverse (7221412), we get a palindrome (28633682).

The spelling of 21412270 in words is "twenty-one million, four hundred twelve thousand, two hundred seventy".