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BaseRepresentation
bin100110101100…
…000101000101
3201002021020102
4212230011011
510044021041
61001213445
7152130401
oct46540505
921067212
1010142021
1157a793a
123491285
1321413c6
1414c0101
15d5509b
hex9ac145

10142021 has 4 divisors (see below), whose sum is σ = 10174944. Its totient is φ = 10109100.

The previous prime is 10142017. The next prime is 10142051. The reversal of 10142021 is 12024101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12024101 = 23522787.

It is a cyclic number.

It is not a de Polignac number, because 10142021 - 22 = 10142017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10141993 and 10142011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10142051) 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, 15995 + ... + 16616.

It is an arithmetic number, because the mean of its divisors is an integer number (2543736).

Almost surely, 210142021 is an apocalyptic number.

It is an amenable number.

10142021 is a deficient number, since it is larger than the sum of its proper divisors (32923).

10142021 is an equidigital number, since it uses as much as digits as its factorization.

10142021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32922.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 10142021 is about 3184.6539843443. The cubic root of 10142021 is about 216.4585949866.

Adding to 10142021 its reverse (12024101), we get a palindrome (22166122).

The spelling of 10142021 in words is "ten million, one hundred forty-two thousand, twenty-one".

Divisors: 1 311 32611 10142021