1153621263 has 16 divisors (see below), whose sum is σ = 1568296800. Its totient is φ = 754136064.

The previous prime is 1153621219. The next prime is 1153621289. The reversal of 1153621263 is 3621263511.

It is not a de Polignac number, because 1153621263 - 2⁶ = 1153621199 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1153621263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1153621663) 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, 22663 + ... + 53111.

It is an arithmetic number, because the mean of its divisors is an integer number (98018550).

Almost surely, 2^1153621263 is an apocalyptic number.

1153621263 is a deficient number, since it is larger than the sum of its proper divisors (414675537).

1153621263 is a wasteful number, since it uses less digits than its factorization.

1153621263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30698.

The product of its digits is 6480, while the sum is 30.

The square root of 1153621263 is about 33965.0005593994. Note that the first 3 decimals coincide. The cubic root of 1153621263 is about 1048.7880992787.

Adding to 1153621263 its reverse (3621263511), we get a palindrome (4774884774).

The spelling of 1153621263 in words is "one billion, one hundred fifty-three million, six hundred twenty-one thousand, two hundred sixty-three".