1153346261 has 4 divisors (see below), whose sum is σ = 1157731872. Its totient is φ = 1148960652.

The previous prime is 1153346237. The next prime is 1153346263. The reversal of 1153346261 is 1626433511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1153346261 - 2¹⁸ = 1153084117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1153346263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2192411 + ... + 2192936.

It is an arithmetic number, because the mean of its divisors is an integer number (289432968).

Almost surely, 2^1153346261 is an apocalyptic number.

It is an amenable number.

1153346261 is a deficient number, since it is larger than the sum of its proper divisors (4385611).

1153346261 is an equidigital number, since it uses as much as digits as its factorization.

1153346261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4385610.

The product of its digits is 12960, while the sum is 32.

The square root of 1153346261 is about 33960.9520037351. The cubic root of 1153346261 is about 1048.7047554191.

Adding to 1153346261 its reverse (1626433511), we get a palindrome (2779779772).

The spelling of 1153346261 in words is "one billion, one hundred fifty-three million, three hundred forty-six thousand, two hundred sixty-one".