1240656106 has 4 divisors (see below), whose sum is σ = 1860984162. Its totient is φ = 620328052.

The previous prime is 1240656083. The next prime is 1240656127. The reversal of 1240656106 is 6016560421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1178892225 + 61763881 = 34335^2 + 7859^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310164025 + ... + 310164028.

Almost surely, 2^1240656106 is an apocalyptic number.

1240656106 is a deficient number, since it is larger than the sum of its proper divisors (620328056).

1240656106 is an equidigital number, since it uses as much as digits as its factorization.

1240656106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620328055.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1240656106 is about 35222.9485704988. The cubic root of 1240656106 is about 1074.5265211808.

The spelling of 1240656106 in words is "one billion, two hundred forty million, six hundred fifty-six thousand, one hundred six".