1154213253 has 32 divisors (see below), whose sum is σ = 1771862400. Its totient is φ = 741702528.

The previous prime is 1154213237. The next prime is 1154213257. The reversal of 1154213253 is 3523124511.

It is not a de Polignac number, because 1154213253 - 2⁴ = 1154213237 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1154213257) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 808126 + ... + 809552.

It is an arithmetic number, because the mean of its divisors is an integer number (55370700).

Almost surely, 2^1154213253 is an apocalyptic number.

It is an amenable number.

1154213253 is a deficient number, since it is larger than the sum of its proper divisors (617649147).

1154213253 is a wasteful number, since it uses less digits than its factorization.

1154213253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2498 (or 2492 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 1154213253 is about 33973.7141478526. The cubic root of 1154213253 is about 1048.9674666081.

Adding to 1154213253 its reverse (3523124511), we get a palindrome (4677337764).

The spelling of 1154213253 in words is "one billion, one hundred fifty-four million, two hundred thirteen thousand, two hundred fifty-three".