1240478 has 4 divisors (see below), whose sum is σ = 1860720. Its totient is φ = 620238.

The previous prime is 1240423. The next prime is 1240483. The reversal of 1240478 is 8740421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8740421 = 41 ⋅213181.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310118 + ... + 310121.

It is an arithmetic number, because the mean of its divisors is an integer number (465180).

2^1240478 is an apocalyptic number.

1240478 is a deficient number, since it is larger than the sum of its proper divisors (620242).

1240478 is an equidigital number, since it uses as much as digits as its factorization.

1240478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620241.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 1240478 is about 1113.7674802220. The cubic root of 1240478 is about 107.4475099792.

Adding to 1240478 its reverse (8740421), we get a palindrome (9980899).

The spelling of 1240478 in words is "one million, two hundred forty thousand, four hundred seventy-eight".