1921000142 has 16 divisors (see below), whose sum is σ = 2953444032. Its totient is φ = 936545280.

The previous prime is 1921000139. The next prime is 1921000177. The reversal of 1921000142 is 2410001291.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167723 + ... + 178809.

It is an arithmetic number, because the mean of its divisors is an integer number (184590252).

Almost surely, 2^1921000142 is an apocalyptic number.

1921000142 is a deficient number, since it is larger than the sum of its proper divisors (1032443890).

1921000142 is a wasteful number, since it uses less digits than its factorization.

1921000142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13243.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 1921000142 is about 43829.2156215463. The cubic root of 1921000142 is about 1243.1087755958.

The spelling of 1921000142 in words is "one billion, nine hundred twenty-one million, one hundred forty-two", and thus it is an aban number.