1247998 has 8 divisors (see below), whose sum is σ = 1932480. Its totient is φ = 603840.

The previous prime is 1247969. The next prime is 1248001. The reversal of 1247998 is 8997421.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1247998.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10003 + ... + 10126.

It is an arithmetic number, because the mean of its divisors is an integer number (241560).

2^1247998 is an apocalyptic number.

1247998 is a deficient number, since it is larger than the sum of its proper divisors (684482).

1247998 is a wasteful number, since it uses less digits than its factorization.

1247998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20162.

The product of its digits is 36288, while the sum is 40.

The square root of 1247998 is about 1117.1383083576. The cubic root of 1247998 is about 107.6641947288.

The spelling of 1247998 in words is "one million, two hundred forty-seven thousand, nine hundred ninety-eight".