1151561235 has 32 divisors (see below), whose sum is σ = 2026644480. Its totient is φ = 558323040.

The previous prime is 1151561161. The next prime is 1151561273. The reversal of 1151561235 is 5321651511.

It is not a de Polignac number, because 1151561235 - 2⁷ = 1151561107 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8875 + ... + 48804.

It is an arithmetic number, because the mean of its divisors is an integer number (63332640).

Almost surely, 2^1151561235 is an apocalyptic number.

1151561235 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1151561235 is a deficient number, since it is larger than the sum of its proper divisors (875083245).

1151561235 is an equidigital number, since it uses as much as digits as its factorization.

1151561235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57720 (or 57698 counting only the distinct ones).

The product of its digits is 4500, while the sum is 30.

The square root of 1151561235 is about 33934.6612624909. The cubic root of 1151561235 is about 1048.1634517095.

The spelling of 1151561235 in words is "one billion, one hundred fifty-one million, five hundred sixty-one thousand, two hundred thirty-five".