1491898 has 8 divisors (see below), whose sum is σ = 2243808. Its totient is φ = 743964.

The previous prime is 1491863. The next prime is 1491911. The reversal of 1491898 is 8981941.

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 1491898.

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, 265 + ... + 1747.

It is an arithmetic number, because the mean of its divisors is an integer number (280476).

2^1491898 is an apocalyptic number.

1491898 is a deficient number, since it is larger than the sum of its proper divisors (751910).

1491898 is a wasteful number, since it uses less digits than its factorization.

1491898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1988.

The product of its digits is 20736, while the sum is 40.

The square root of 1491898 is about 1221.4327652392. The cubic root of 1491898 is about 114.2649526274.

The spelling of 1491898 in words is "one million, four hundred ninety-one thousand, eight hundred ninety-eight".