1371998 has 8 divisors (see below), whose sum is σ = 2124480. Its totient is φ = 663840.

The previous prime is 1371991. The next prime is 1372027. The reversal of 1371998 is 8991731.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1371991) 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, 11003 + ... + 11126.

It is an arithmetic number, because the mean of its divisors is an integer number (265560).

2^1371998 is an apocalyptic number.

1371998 is a deficient number, since it is larger than the sum of its proper divisors (752482).

1371998 is a wasteful number, since it uses less digits than its factorization.

1371998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22162.

The product of its digits is 13608, while the sum is 38.

The square root of 1371998 is about 1171.3231834127. The cubic root of 1371998 is about 111.1180196445.

The spelling of 1371998 in words is "one million, three hundred seventy-one thousand, nine hundred ninety-eight".