1235131345 has 48 divisors (see below), whose sum is σ = 1830487680. Its totient is φ = 781028352.

The previous prime is 1235131321. The next prime is 1235131351. The reversal of 1235131345 is 5431315321.

It is a happy number.

It is not a de Polignac number, because 1235131345 - 2²¹ = 1233034193 is a prime.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 1670986 + ... + 1671724.

It is an arithmetic number, because the mean of its divisors is an integer number (38135160).

Almost surely, 2^1235131345 is an apocalyptic number.

It is an amenable number.

1235131345 is a deficient number, since it is larger than the sum of its proper divisors (595356335).

1235131345 is an equidigital number, since it uses as much as digits as its factorization.

1235131345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874 (or 821 counting only the distinct ones).

The product of its digits is 5400, while the sum is 28.

The square root of 1235131345 is about 35144.4354770425. The cubic root of 1235131345 is about 1072.9291577662.

Adding to 1235131345 its reverse (5431315321), we get a palindrome (6666446666).

The spelling of 1235131345 in words is "one billion, two hundred thirty-five million, one hundred thirty-one thousand, three hundred forty-five".