1001251142 has 16 divisors (see below), whose sum is σ = 1593788400. Its totient is φ = 470120448.

The previous prime is 1001251099. The next prime is 1001251171. The reversal of 1001251142 is 2411521001.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 1001251142.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17528 + ... + 48059.

It is an arithmetic number, because the mean of its divisors is an integer number (99611775).

Almost surely, 2^1001251142 is an apocalyptic number.

1001251142 is a deficient number, since it is larger than the sum of its proper divisors (592537258).

1001251142 is a wasteful number, since it uses less digits than its factorization.

1001251142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66055.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 1001251142 is about 31642.5527099190. The cubic root of 1001251142 is about 1000.4168735256.

Adding to 1001251142 its reverse (2411521001), we get a palindrome (3412772143).

The spelling of 1001251142 in words is "one billion, one million, two hundred fifty-one thousand, one hundred forty-two".