1871142 has 64 divisors (see below), whose sum is σ = 4838400. Its totient is φ = 468864.

The previous prime is 1871137. The next prime is 1871147. The reversal of 1871142 is 2411781.

It is an interprime number because it is at equal distance from previous prime (1871137) and next prime (1871147).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1871147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12484 + ... + 12632.

It is an arithmetic number, because the mean of its divisors is an integer number (75600).

2^1871142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1871142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2419200).

1871142 is an abundant number, since it is smaller than the sum of its proper divisors (2967258).

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

1871142 is a wasteful number, since it uses less digits than its factorization.

1871142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197.

The product of its digits is 448, while the sum is 24.

The square root of 1871142 is about 1367.8969259414. The cubic root of 1871142 is about 123.2259710105.

The spelling of 1871142 in words is "one million, eight hundred seventy-one thousand, one hundred forty-two".