1235243155 has 16 divisors (see below), whose sum is σ = 1539419904. Its totient is φ = 950796000.

The previous prime is 1235243071. The next prime is 1235243159. The reversal of 1235243155 is 5513425321.

It is not a de Polignac number, because 1235243155 - 2⁷ = 1235243027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1235243159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28471 + ... + 57280.

It is an arithmetic number, because the mean of its divisors is an integer number (96213744).

Almost surely, 2^1235243155 is an apocalyptic number.

1235243155 is a deficient number, since it is larger than the sum of its proper divisors (304176749).

1235243155 is an equidigital number, since it uses as much as digits as its factorization.

1235243155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85866.

The product of its digits is 18000, while the sum is 31.

The square root of 1235243155 is about 35146.0261622847. The cubic root of 1235243155 is about 1072.9615323499.

Adding to 1235243155 its reverse (5513425321), we get a palindrome (6748668476).

The spelling of 1235243155 in words is "one billion, two hundred thirty-five million, two hundred forty-three thousand, one hundred fifty-five".