1154021231 has 8 divisors (see below), whose sum is σ = 1292957904. Its totient is φ = 1020755520.

The previous prime is 1154021213. The next prime is 1154021233. The reversal of 1154021231 is 1321204511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1154021231 - 2¹⁴ = 1154004847 is a prime.

It is a super-2 number, since 2×1154021231² = 2663530003197510722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1154021233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1417310 + ... + 1418123.

It is an arithmetic number, because the mean of its divisors is an integer number (161619738).

Almost surely, 2^1154021231 is an apocalyptic number.

1154021231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1154021231 is a deficient number, since it is larger than the sum of its proper divisors (138936673).

1154021231 is a wasteful number, since it uses less digits than its factorization.

1154021231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2835481.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1154021231 is about 33970.8879925150. The cubic root of 1154021231 is about 1048.9092924936.

Adding to 1154021231 its reverse (1321204511), we get a palindrome (2475225742).

The spelling of 1154021231 in words is "one billion, one hundred fifty-four million, twenty-one thousand, two hundred thirty-one".