1363661 has 6 divisors (see below), whose sum is σ = 1476810. Its totient is φ = 1258608.

The previous prime is 1363631. The next prime is 1363673. The reversal of 1363661 is 1663631.

It can be written as a sum of positive squares in 3 ways, for example, as 175561 + 1188100 = 419^2 + 1090^2 .

It is not a de Polignac number, because 1363661 - 2¹⁰ = 1362637 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1363661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1363631) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3866 + ... + 4203.

It is an arithmetic number, because the mean of its divisors is an integer number (246135).

2^1363661 is an apocalyptic number.

It is an amenable number.

1363661 is a deficient number, since it is larger than the sum of its proper divisors (113149).

1363661 is an equidigital number, since it uses as much as digits as its factorization.

1363661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8095 (or 8082 counting only the distinct ones).

The product of its digits is 1944, while the sum is 26.

The square root of 1363661 is about 1167.7589648553. The cubic root of 1363661 is about 110.8924912042.

The spelling of 1363661 in words is "one million, three hundred sixty-three thousand, six hundred sixty-one".