1240366545 has 24 divisors (see below), whose sum is σ = 2345421312. Its totient is φ = 601389600.

The previous prime is 1240366507. The next prime is 1240366549. The reversal of 1240366545 is 5456630421.

1240366545 is a `hidden beast` number, since 1 + 240 + 366 + 54 + 5 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1240366545 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1240366549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1252401 + ... + 1253390.

It is an arithmetic number, because the mean of its divisors is an integer number (97725888).

Almost surely, 2^1240366545 is an apocalyptic number.

1240366545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1240366545 is a deficient number, since it is larger than the sum of its proper divisors (1105054767).

1240366545 is a wasteful number, since it uses less digits than its factorization.

1240366545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2505813 (or 2505810 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 1240366545 is about 35218.8379280180. The cubic root of 1240366545 is about 1074.4429188616.

Adding to 1240366545 its reverse (5456630421), we get a palindrome (6696996966).

The spelling of 1240366545 in words is "one billion, two hundred forty million, three hundred sixty-six thousand, five hundred forty-five".