1240445506 has 16 divisors (see below), whose sum is σ = 1897129080. Its totient is φ = 608186880.

The previous prime is 1240445497. The next prime is 1240445509. The reversal of 1240445506 is 6055440421.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 883575625 + 356869881 = 29725^2 + 18891^2 .

It is not an unprimeable number, because it can be changed into a prime (1240445509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8185 + ... + 50476.

Almost surely, 2^1240445506 is an apocalyptic number.

1240445506 is a deficient number, since it is larger than the sum of its proper divisors (656683574).

1240445506 is a wasteful number, since it uses less digits than its factorization.

1240445506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58869.

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 1240445506 is about 35219.9589153650. The cubic root of 1240445506 is about 1074.4657178446.

Adding to 1240445506 its reverse (6055440421), we get a palindrome (7295885927).

The spelling of 1240445506 in words is "one billion, two hundred forty million, four hundred forty-five thousand, five hundred six".