1864442 has 4 divisors (see below), whose sum is σ = 2796666. Its totient is φ = 932220.

The previous prime is 1864427. The next prime is 1864453. The reversal of 1864442 is 2444681.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1615441 + 249001 = 1271^2 + 499^2 .

It is a super-2 number, since 2×1864442² = 6952287942728, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 466109 + ... + 466112.

2^1864442 is an apocalyptic number.

1864442 is a deficient number, since it is larger than the sum of its proper divisors (932224).

1864442 is an equidigital number, since it uses as much as digits as its factorization.

1864442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932223.

The product of its digits is 6144, while the sum is 29.

The square root of 1864442 is about 1365.4457147759. The cubic root of 1864442 is about 123.0787166606.

The spelling of 1864442 in words is "one million, eight hundred sixty-four thousand, four hundred forty-two".