21462442 has 8 divisors (see below), whose sum is σ = 33063876. Its totient is φ = 10441152.

The previous prime is 21462433. The next prime is 21462443. The reversal of 21462442 is 24426412.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19527561 + 1934881 = 4419^2 + 1391^2 .

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

21462442 is a modest number, since divided by 2442 gives 2146 as remainder.

It is not an unprimeable number, because it can be changed into a prime (21462443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144943 + ... + 145090.

Almost surely, 2^21462442 is an apocalyptic number.

21462442 is a deficient number, since it is larger than the sum of its proper divisors (11601434).

21462442 is a wasteful number, since it uses less digits than its factorization.

21462442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290072.

The product of its digits is 3072, while the sum is 25.

The square root of 21462442 is about 4632.7574941928. The cubic root of 21462442 is about 277.9028782762.

Adding to 21462442 its reverse (24426412), we get a palindrome (45888854).

It can be divided in two parts, 21462 and 442, that added together give a square (21904 = 148²).

The spelling of 21462442 in words is "twenty-one million, four hundred sixty-two thousand, four hundred forty-two".