21341456 has 10 divisors (see below), whose sum is σ = 41349102. Its totient is φ = 10670720.

The previous prime is 21341407. The next prime is 21341479. The reversal of 21341456 is 65414312.

It can be written as a sum of positive squares in only one way, i.e., 14137600 + 7203856 = 3760^2 + 2684^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 666905 + ... + 666936.

Almost surely, 2^21341456 is an apocalyptic number.

It is an amenable number.

21341456 is a deficient number, since it is larger than the sum of its proper divisors (20007646).

21341456 is a wasteful number, since it uses less digits than its factorization.

21341456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333849 (or 1333843 counting only the distinct ones).

The product of its digits is 2880, while the sum is 26.

The square root of 21341456 is about 4619.6813742941. The cubic root of 21341456 is about 277.3797049145.

Adding to 21341456 its reverse (65414312), we get a palindrome (86755768).

The spelling of 21341456 in words is "twenty-one million, three hundred forty-one thousand, four hundred fifty-six".