1491418 has 4 divisors (see below), whose sum is σ = 2237130. Its totient is φ = 745708.

The previous prime is 1491407. The next prime is 1491419. The reversal of 1491418 is 8141941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8141941 = 59 ⋅137999.

It can be written as a sum of positive squares in only one way, i.e., 1046529 + 444889 = 1023^2 + 667^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1491419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372853 + ... + 372856.

2^1491418 is an apocalyptic number.

1491418 is a deficient number, since it is larger than the sum of its proper divisors (745712).

1491418 is an equidigital number, since it uses as much as digits as its factorization.

1491418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745711.

The product of its digits is 1152, while the sum is 28.

The square root of 1491418 is about 1221.2362588787. The cubic root of 1491418 is about 114.2526968609.

The spelling of 1491418 in words is "one million, four hundred ninety-one thousand, four hundred eighteen".