1986251042 has 8 divisors (see below), whose sum is σ = 2983899600. Its totient is φ = 991617844.

The previous prime is 1986251041. The next prime is 1986251053. The reversal of 1986251042 is 2401526891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1986250987 and 1986251005.

It is not an unprimeable number, because it can be changed into a prime (1986251041) 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, 752192 + ... + 754827.

It is an arithmetic number, because the mean of its divisors is an integer number (372987450).

Almost surely, 2^1986251042 is an apocalyptic number.

1986251042 is a deficient number, since it is larger than the sum of its proper divisors (997648558).

1986251042 is a wasteful number, since it uses less digits than its factorization.

1986251042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507680.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 1986251042 is about 44567.3764316456. The cubic root of 1986251042 is about 1257.0273084754.

The spelling of 1986251042 in words is "one billion, nine hundred eighty-six million, two hundred fifty-one thousand, forty-two".