1987371 has 12 divisors (see below), whose sum is σ = 2882880. Its totient is φ = 1319280.

The previous prime is 1987339. The next prime is 1987373. The reversal of 1987371 is 1737891.

It is not a de Polignac number, because 1987371 - 2⁵ = 1987339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1987373) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3910 + ... + 4388.

It is an arithmetic number, because the mean of its divisors is an integer number (240240).

2^1987371 is an apocalyptic number.

1987371 is a deficient number, since it is larger than the sum of its proper divisors (895509).

1987371 is a wasteful number, since it uses less digits than its factorization.

1987371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946 (or 943 counting only the distinct ones).

The product of its digits is 10584, while the sum is 36.

The square root of 1987371 is about 1409.7414656596. The cubic root of 1987371 is about 125.7263524550.

It can be divided in two parts, 198 and 7371, that added together give a square (7569 = 87²).

The spelling of 1987371 in words is "one million, nine hundred eighty-seven thousand, three hundred seventy-one".