1240131553 has 16 divisors (see below), whose sum is σ = 1320065280. Its totient is φ = 1162800576.

The previous prime is 1240131523. The next prime is 1240131559. The reversal of 1240131553 is 3551310421.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1240131553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1240131559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 951100 + ... + 952402.

It is an arithmetic number, because the mean of its divisors is an integer number (82504080).

Almost surely, 2^1240131553 is an apocalyptic number.

It is an amenable number.

1240131553 is a deficient number, since it is larger than the sum of its proper divisors (79933727).

1240131553 is a wasteful number, since it uses less digits than its factorization.

1240131553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2256.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1240131553 is about 35215.5016008575. The cubic root of 1240131553 is about 1074.3750621898.

Adding to 1240131553 its reverse (3551310421), we get a palindrome (4791441974).

The spelling of 1240131553 in words is "one billion, two hundred forty million, one hundred thirty-one thousand, five hundred fifty-three".