1240453557 has 24 divisors (see below), whose sum is σ = 2068853696. Its totient is φ = 701519616.

The previous prime is 1240453547. The next prime is 1240453559. The reversal of 1240453557 is 7553540421.

1240453557 is a `hidden beast` number, since 12 + 40 + 4 + 53 + 557 = 666.

It is not a de Polignac number, because 1240453557 - 2¹⁵ = 1240420789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240453559) 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, 95383 + ... + 107604.

Almost surely, 2^1240453557 is an apocalyptic number.

It is an amenable number.

1240453557 is a deficient number, since it is larger than the sum of its proper divisors (828400139).

1240453557 is a wasteful number, since it uses less digits than its factorization.

1240453557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203097 (or 203094 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 36.

The square root of 1240453557 is about 35220.0732111675. The cubic root of 1240453557 is about 1074.4680424139.

Adding to 1240453557 its reverse (7553540421), we get a palindrome (8793993978).

The spelling of 1240453557 in words is "one billion, two hundred forty million, four hundred fifty-three thousand, five hundred fifty-seven".