1987441 has 8 divisors (see below), whose sum is σ = 2087168. Its totient is φ = 1890000.

The previous prime is 1987439. The next prime is 1987451. The reversal of 1987441 is 1447891.

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

It is a 4-Lehmer number, since φ(1987441) divides (1987441-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 1987441 - 2¹ = 1987439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1987397 and 1987406.

It is not an unprimeable number, because it can be changed into a prime (1987411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1366 + ... + 2416.

It is an arithmetic number, because the mean of its divisors is an integer number (260896).

2^1987441 is an apocalyptic number.

It is an amenable number.

1987441 is a deficient number, since it is larger than the sum of its proper divisors (99727).

1987441 is a wasteful number, since it uses less digits than its factorization.

1987441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1143.

The product of its digits is 8064, while the sum is 34.

The square root of 1987441 is about 1409.7662926883. The cubic root of 1987441 is about 125.7278285661.

The spelling of 1987441 in words is "one million, nine hundred eighty-seven thousand, four hundred forty-one".