1240135453 has 16 divisors (see below), whose sum is σ = 1324270080. Its totient is φ = 1157957424.

The previous prime is 1240135451. The next prime is 1240135483. The reversal of 1240135453 is 3545310421.

It is a cyclic number.

It is not a de Polignac number, because 1240135453 - 2¹ = 1240135451 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240135451) 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, 1013400 + ... + 1014622.

It is an arithmetic number, because the mean of its divisors is an integer number (82766880).

Almost surely, 2^1240135453 is an apocalyptic number.

It is an amenable number.

1240135453 is a deficient number, since it is larger than the sum of its proper divisors (84134627).

1240135453 is a wasteful number, since it uses less digits than its factorization.

1240135453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1968.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 1240135453 is about 35215.5569741556. The cubic root of 1240135453 is about 1074.3761884300.

Adding to 1240135453 its reverse (3545310421), we get a palindrome (4785445874).

The spelling of 1240135453 in words is "one billion, two hundred forty million, one hundred thirty-five thousand, four hundred fifty-three".