21034142 has 8 divisors (see below), whose sum is σ = 32068632. Its totient is φ = 10344600.

The previous prime is 21034133. The next prime is 21034183. The reversal of 21034142 is 24143012.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21034142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86084 + ... + 86327.

It is an arithmetic number, because the mean of its divisors is an integer number (4008579).

Almost surely, 2^21034142 is an apocalyptic number.

21034142 is a deficient number, since it is larger than the sum of its proper divisors (11034490).

21034142 is a wasteful number, since it uses less digits than its factorization.

21034142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172474.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 21034142 is about 4586.2993796742. The cubic root of 21034142 is about 276.0418528563.

Adding to 21034142 its reverse (24143012), we get a palindrome (45177154).

The spelling of 21034142 in words is "twenty-one million, thirty-four thousand, one hundred forty-two".