1154253121 has 16 divisors (see below), whose sum is σ = 1338163200. Its totient is φ = 975141648.

The previous prime is 1154253103. The next prime is 1154253127. The reversal of 1154253121 is 1213524511.

It is a cyclic number.

It is not a de Polignac number, because 1154253121 - 2¹¹ = 1154251073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1154253127) 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, 396156 + ... + 399058.

It is an arithmetic number, because the mean of its divisors is an integer number (83635200).

Almost surely, 2^1154253121 is an apocalyptic number.

It is an amenable number.

1154253121 is a deficient number, since it is larger than the sum of its proper divisors (183910079).

1154253121 is an equidigital number, since it uses as much as digits as its factorization.

1154253121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3708.

The product of its digits is 1200, while the sum is 25.

The square root of 1154253121 is about 33974.3008905261. The cubic root of 1154253121 is about 1048.9795440278.

Adding to 1154253121 its reverse (1213524511), we get a palindrome (2367777632).

The spelling of 1154253121 in words is "one billion, one hundred fifty-four million, two hundred fifty-three thousand, one hundred twenty-one".