1245143123 has 8 divisors (see below), whose sum is σ = 1424906592. Its totient is φ = 1065851136.

The previous prime is 1245143083. The next prime is 1245143143. The reversal of 1245143123 is 3213415421.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1245143123 - 2⁸ = 1245142867 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1245143092 and 1245143101.

It is not an unprimeable number, because it can be changed into a prime (1245143143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112190 + ... + 122787.

It is an arithmetic number, because the mean of its divisors is an integer number (178113324).

Almost surely, 2^1245143123 is an apocalyptic number.

1245143123 is a deficient number, since it is larger than the sum of its proper divisors (179763469).

1245143123 is an equidigital number, since it uses as much as digits as its factorization.

1245143123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235741.

The product of its digits is 2880, while the sum is 26.

The square root of 1245143123 is about 35286.5855956623. The cubic root of 1245143123 is about 1075.8203575458.

Adding to 1245143123 its reverse (3213415421), we get a palindrome (4458558544).

The spelling of 1245143123 in words is "one billion, two hundred forty-five million, one hundred forty-three thousand, one hundred twenty-three".