10001142 has 24 divisors (see below), whose sum is σ = 21790080. Its totient is φ = 3315120.

The previous prime is 10001119. The next prime is 10001203. The reversal of 10001142 is 24110001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1984 + ... + 4892.

It is an arithmetic number, because the mean of its divisors is an integer number (907920).

Almost surely, 2^10001142 is an apocalyptic number.

10001142 is an abundant number, since it is smaller than the sum of its proper divisors (11788938).

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

10001142 is a wasteful number, since it uses less digits than its factorization.

10001142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3108 (or 3105 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 10001142 is about 3162.4582210679. The cubic root of 10001142 is about 215.4516699057.

Adding to 10001142 its reverse (24110001), we get a palindrome (34111143).

The spelling of 10001142 in words is "ten million, one thousand, one hundred forty-two".