1871442 has 12 divisors (see below), whose sum is σ = 4054830. Its totient is φ = 623808.

The previous prime is 1871437. The next prime is 1871447. The reversal of 1871442 is 2441781.

It is an interprime number because it is at equal distance from previous prime (1871437) and next prime (1871447).

It can be written as a sum of positive squares in only one way, i.e., 1687401 + 184041 = 1299^2 + 429^2 .

It is not an unprimeable number, because it can be changed into a prime (1871447) 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, 51967 + ... + 52002.

2^1871442 is an apocalyptic number.

1871442 is an abundant number, since it is smaller than the sum of its proper divisors (2183388).

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

1871442 is a wasteful number, since it uses less digits than its factorization.

1871442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103977 (or 103974 counting only the distinct ones).

The product of its digits is 1792, while the sum is 27.

The square root of 1871442 is about 1368.0065789315. The cubic root of 1871442 is about 123.2325562609.

It can be divided in two parts, 18 and 71442, that multiplied together give a square (1285956 = 1134²).

The spelling of 1871442 in words is "one million, eight hundred seventy-one thousand, four hundred forty-two".