21060143 has 8 divisors (see below), whose sum is σ = 22722336. Its totient is φ = 19404000.

The previous prime is 21060139. The next prime is 21060163. The reversal of 21060143 is 34106012.

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 21060143 - 2² = 21060139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21060163) 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, 7958 + ... + 10268.

It is an arithmetic number, because the mean of its divisors is an integer number (2840292).

Almost surely, 2^21060143 is an apocalyptic number.

21060143 is a deficient number, since it is larger than the sum of its proper divisors (1662193).

21060143 is a wasteful number, since it uses less digits than its factorization.

21060143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3025.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 21060143 is about 4589.1331425445. The cubic root of 21060143 is about 276.1555475161.

Adding to 21060143 its reverse (34106012), we get a palindrome (55166155).

The spelling of 21060143 in words is "twenty-one million, sixty thousand, one hundred forty-three".