1861463 has 4 divisors (see below), whose sum is σ = 1864680. Its totient is φ = 1858248.

The previous prime is 1861417. The next prime is 1861469. The reversal of 1861463 is 3641681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3641681 = 397 ⋅9173.

It is a cyclic number.

It is not a de Polignac number, because 1861463 - 2¹⁸ = 1599319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1861469) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 473 + ... + 1986.

It is an arithmetic number, because the mean of its divisors is an integer number (466170).

2^1861463 is an apocalyptic number.

1861463 is a deficient number, since it is larger than the sum of its proper divisors (3217).

1861463 is an equidigital number, since it uses as much as digits as its factorization.

1861463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3216.

The product of its digits is 3456, while the sum is 29.

The square root of 1861463 is about 1364.3544260932. The cubic root of 1861463 is about 123.0131301118.

The spelling of 1861463 in words is "one million, eight hundred sixty-one thousand, four hundred sixty-three".