21460542 has 16 divisors (see below), whose sum is σ = 43649280. Its totient is φ = 7032152.

The previous prime is 21460501. The next prime is 21460547. The reversal of 21460542 is 24506412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21460547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29958 + ... + 30665.

It is an arithmetic number, because the mean of its divisors is an integer number (2728080).

Almost surely, 2^21460542 is an apocalyptic number.

21460542 is an abundant number, since it is smaller than the sum of its proper divisors (22188738).

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

21460542 is a wasteful number, since it uses less digits than its factorization.

21460542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60687.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 21460542 is about 4632.5524281977. The cubic root of 21460542 is about 277.8946774224.

Adding to 21460542 its reverse (24506412), we get a palindrome (45966954).

The spelling of 21460542 in words is "twenty-one million, four hundred sixty thousand, five hundred forty-two".