21413001 has 8 divisors (see below), whose sum is σ = 28610784. Its totient is φ = 14245280.

The previous prime is 21412987. The next prime is 21413003. The reversal of 21413001 is 10031412.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21413001 - 2¹⁹ = 20888713 is a prime.

It is a super-2 number, since 2×21413001² = 917033223652002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21413003) 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, 5796 + ... + 8741.

It is an arithmetic number, because the mean of its divisors is an integer number (3576348).

Almost surely, 2^21413001 is an apocalyptic number.

It is an amenable number.

21413001 is a deficient number, since it is larger than the sum of its proper divisors (7197783).

21413001 is a wasteful number, since it uses less digits than its factorization.

21413001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15031.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 21413001 is about 4627.4183947424. The cubic root of 21413001 is about 277.6893213398.

Adding to 21413001 its reverse (10031412), we get a palindrome (31444413).

The spelling of 21413001 in words is "twenty-one million, four hundred thirteen thousand, one".