1861402 has 8 divisors (see below), whose sum is σ = 2798676. Its totient is φ = 928512.

The previous prime is 1861397. The next prime is 1861403. The reversal of 1861402 is 2041681.

It can be written as a sum of positive squares in 2 ways, for example, as 1560001 + 301401 = 1249^2 + 549^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1861403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348 + ... + 1960.

2^1861402 is an apocalyptic number.

1861402 is a deficient number, since it is larger than the sum of its proper divisors (937274).

1861402 is a wasteful number, since it uses less digits than its factorization.

1861402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2192.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 1861402 is about 1364.3320710150. The cubic root of 1861402 is about 123.0117863868.

The spelling of 1861402 in words is "one million, eight hundred sixty-one thousand, four hundred two".