1866534 has 16 divisors (see below), whose sum is σ = 3767472. Its totient is φ = 616448.

The previous prime is 1866521. The next prime is 1866547. The reversal of 1866534 is 4356681.

It is an interprime number because it is at equal distance from previous prime (1866521) and next prime (1866547).

It is a junction number, because it is equal to n+sod(n) for n = 1866495 and 1866504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 699 + ... + 2054.

It is an arithmetic number, because the mean of its divisors is an integer number (235467).

2^1866534 is an apocalyptic number.

1866534 is an abundant number, since it is smaller than the sum of its proper divisors (1900938).

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

1866534 is a wasteful number, since it uses less digits than its factorization.

1866534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2871.

The product of its digits is 17280, while the sum is 33.

The square root of 1866534 is about 1366.2115502366. The cubic root of 1866534 is about 123.1247330081.

The spelling of 1866534 in words is "one million, eight hundred sixty-six thousand, five hundred thirty-four".