1233423145 has 4 divisors (see below), whose sum is σ = 1480107780. Its totient is φ = 986738512.

The previous prime is 1233423127. The next prime is 1233423173. The reversal of 1233423145 is 5413243321.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 548449561 + 684973584 = 23419^2 + 26172^2 .

It is a cyclic number.

It is not a de Polignac number, because 1233423145 - 2⁷ = 1233423017 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123342310 + ... + 123342319.

It is an arithmetic number, because the mean of its divisors is an integer number (370026945).

Almost surely, 2^1233423145 is an apocalyptic number.

It is an amenable number.

1233423145 is a deficient number, since it is larger than the sum of its proper divisors (246684635).

1233423145 is an equidigital number, since it uses as much as digits as its factorization.

1233423145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246684634.

The product of its digits is 8640, while the sum is 28.

The square root of 1233423145 is about 35120.1245014877. The cubic root of 1233423145 is about 1072.4343053600.

Adding to 1233423145 its reverse (5413243321), we get a palindrome (6646666466).

The spelling of 1233423145 in words is "one billion, two hundred thirty-three million, four hundred twenty-three thousand, one hundred forty-five".