1240265453 has 16 divisors (see below), whose sum is σ = 1467088896. Its totient is φ = 1026036720.

The previous prime is 1240265449. The next prime is 1240265459. The reversal of 1240265453 is 3545620421.

It is a cyclic number.

It is not a de Polignac number, because 1240265453 - 2² = 1240265449 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240265459) 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 15 ways as a sum of consecutive naturals, for example, 75650 + ... + 90572.

It is an arithmetic number, because the mean of its divisors is an integer number (91693056).

Almost surely, 2^1240265453 is an apocalyptic number.

It is an amenable number.

1240265453 is a deficient number, since it is larger than the sum of its proper divisors (226823443).

1240265453 is a wasteful number, since it uses less digits than its factorization.

1240265453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15344.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 1240265453 is about 35217.4027009375. The cubic root of 1240265453 is about 1074.4137284219.

Adding to 1240265453 its reverse (3545620421), we get a palindrome (4785885874).

The spelling of 1240265453 in words is "one billion, two hundred forty million, two hundred sixty-five thousand, four hundred fifty-three".