1661463 has 6 divisors (see below), whose sum is σ = 2399904. Its totient is φ = 1107636.

The previous prime is 1661447. The next prime is 1661479. The reversal of 1661463 is 3641661.

It is an interprime number because it is at equal distance from previous prime (1661447) and next prime (1661479).

It is not a de Polignac number, because 1661463 - 2⁴ = 1661447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661063) 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 5 ways as a sum of consecutive naturals, for example, 92295 + ... + 92312.

It is an arithmetic number, because the mean of its divisors is an integer number (399984).

2^1661463 is an apocalyptic number.

1661463 is a deficient number, since it is larger than the sum of its proper divisors (738441).

1661463 is a wasteful number, since it uses less digits than its factorization.

1661463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184613 (or 184610 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 1661463 is about 1288.9775017431. The cubic root of 1661463 is about 118.4395889268.

The spelling of 1661463 in words is "one million, six hundred sixty-one thousand, four hundred sixty-three".