1240806426 has 16 divisors (see below), whose sum is σ = 2528436384. Its totient is φ = 405798224.

The previous prime is 1240806407. The next prime is 1240806431. The reversal of 1240806426 is 6246080421.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1950636 + ... + 1951271.

It is an arithmetic number, because the mean of its divisors is an integer number (158027274).

Almost surely, 2^1240806426 is an apocalyptic number.

1240806426 is an abundant number, since it is smaller than the sum of its proper divisors (1287629958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1240806426 is a wasteful number, since it uses less digits than its factorization.

1240806426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3901965.

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 1240806426 is about 35225.0823419903. The cubic root of 1240806426 is about 1074.5699165807.

Adding to 1240806426 its reverse (6246080421), we get a palindrome (7486886847).

The spelling of 1240806426 in words is "one billion, two hundred forty million, eight hundred six thousand, four hundred twenty-six".