1275000123 has 8 divisors (see below), whose sum is σ = 1715888448. Its totient is φ = 842055944.

The previous prime is 1275000113. The next prime is 1275000173. The reversal of 1275000123 is 3210005721.

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

It is a cyclic number.

It is not a de Polignac number, because 1275000123 - 2⁵ = 1275000091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1275000123.

It is not an unprimeable number, because it can be changed into a prime (1275000113) 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, 1985661 + ... + 1986302.

It is an arithmetic number, because the mean of its divisors is an integer number (214486056).

Almost surely, 2^1275000123 is an apocalyptic number.

1275000123 is a deficient number, since it is larger than the sum of its proper divisors (440888325).

1275000123 is a wasteful number, since it uses less digits than its factorization.

1275000123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3972073.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 1275000123 is about 35707.1438650587. The cubic root of 1275000123 is about 1084.3514774944.

Adding to 1275000123 its reverse (3210005721), we get a palindrome (4485005844).

The spelling of 1275000123 in words is "one billion, two hundred seventy-five million, one hundred twenty-three", and thus it is an aban number.