2001042142 has 16 divisors (see below), whose sum is σ = 3291405552. Its totient is φ = 904849920.

The previous prime is 2001042119. The next prime is 2001042143. The reversal of 2001042142 is 2412401002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001042143) 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, 231393 + ... + 239884.

It is an arithmetic number, because the mean of its divisors is an integer number (205712847).

Almost surely, 2^2001042142 is an apocalyptic number.

2001042142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2001042142 is a deficient number, since it is larger than the sum of its proper divisors (1290363410).

2001042142 is a wasteful number, since it uses less digits than its factorization.

2001042142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471483.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 2001042142 is about 44733.0095343472. The cubic root of 2001042142 is about 1260.1398480033.

Adding to 2001042142 its reverse (2412401002), we get a palindrome (4413443144).

The spelling of 2001042142 in words is "two billion, one million, forty-two thousand, one hundred forty-two".