1361998 has 8 divisors (see below), whose sum is σ = 2228760. Its totient is φ = 619080.

The previous prime is 1361963. The next prime is 1361999. The reversal of 1361998 is 8991631.

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

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30933 + ... + 30976.

It is an arithmetic number, because the mean of its divisors is an integer number (278595).

2^1361998 is an apocalyptic number.

1361998 is a deficient number, since it is larger than the sum of its proper divisors (866762).

1361998 is a wasteful number, since it uses less digits than its factorization.

1361998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61922.

The product of its digits is 11664, while the sum is 37.

The square root of 1361998 is about 1167.0467000082. The cubic root of 1361998 is about 110.8473946519.

The spelling of 1361998 in words is "one million, three hundred sixty-one thousand, nine hundred ninety-eight".