1891415142 has 12 divisors (see below), whose sum is σ = 4098066180. Its totient is φ = 630471708.

The previous prime is 1891415129. The next prime is 1891415147. The reversal of 1891415142 is 2415141981.

1891415142 is a `hidden beast` number, since 18 + 91 + 41 + 514 + 2 = 666.

1891415142 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1891415097 and 1891415106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1891415147) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52539292 + ... + 52539327.

It is an arithmetic number, because the mean of its divisors is an integer number (341505515).

Almost surely, 2^1891415142 is an apocalyptic number.

1891415142 is an abundant number, since it is smaller than the sum of its proper divisors (2206651038).

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

1891415142 is a wasteful number, since it uses less digits than its factorization.

1891415142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105078627 (or 105078624 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 1891415142 is about 43490.4028723579. The cubic root of 1891415142 is about 1236.6940951754.

The spelling of 1891415142 in words is "one billion, eight hundred ninety-one million, four hundred fifteen thousand, one hundred forty-two".