1273604123 has 4 divisors (see below), whose sum is σ = 1389386328. Its totient is φ = 1157821920.

The previous prime is 1273604099. The next prime is 1273604131. The reversal of 1273604123 is 3214063721.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3214063721 = 11 ⋅292187611.

It is a cyclic number.

It is not a de Polignac number, because 1273604123 - 2⁸ = 1273603867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1273604023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57891086 + ... + 57891107.

It is an arithmetic number, because the mean of its divisors is an integer number (347346582).

Almost surely, 2^1273604123 is an apocalyptic number.

1273604123 is a deficient number, since it is larger than the sum of its proper divisors (115782205).

1273604123 is a wasteful number, since it uses less digits than its factorization.

1273604123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115782204.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 1273604123 is about 35687.5906023368. The cubic root of 1273604123 is about 1083.9555801549.

Adding to 1273604123 its reverse (3214063721), we get a palindrome (4487667844).

The spelling of 1273604123 in words is "one billion, two hundred seventy-three million, six hundred four thousand, one hundred twenty-three".