1861250142 has 8 divisors (see below), whose sum is σ = 3722500296. Its totient is φ = 620416712.

The previous prime is 1861250129. The next prime is 1861250143. The reversal of 1861250142 is 2410521681.

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

1861250142 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1861250143) 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, 155104173 + ... + 155104184.

It is an arithmetic number, because the mean of its divisors is an integer number (465312537).

Almost surely, 2^1861250142 is an apocalyptic number.

1861250142 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1861250142 is a wasteful number, since it uses less digits than its factorization.

1861250142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310208362.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 1861250142 is about 43142.2083579411. The cubic root of 1861250142 is about 1230.0844108902.

The spelling of 1861250142 in words is "one billion, eight hundred sixty-one million, two hundred fifty thousand, one hundred forty-two".