1154342021 has 16 divisors (see below), whose sum is σ = 1377886080. Its totient is φ = 946365120.

The previous prime is 1154342011. The next prime is 1154342027. The reversal of 1154342021 is 1202434511.

It is a cyclic number.

It is not a de Polignac number, because 1154342021 - 2³⁰ = 80600197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1154342027) 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, 22490 + ... + 53051.

It is an arithmetic number, because the mean of its divisors is an integer number (86117880).

Almost surely, 2^1154342021 is an apocalyptic number.

It is an amenable number.

1154342021 is a deficient number, since it is larger than the sum of its proper divisors (223544059).

1154342021 is an equidigital number, since it uses as much as digits as its factorization.

1154342021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75644.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1154342021 is about 33975.6092071945. The cubic root of 1154342021 is about 1049.0064739636.

Adding to 1154342021 its reverse (1202434511), we get a palindrome (2356776532).

The spelling of 1154342021 in words is "one billion, one hundred fifty-four million, three hundred forty-two thousand, twenty-one".