1275123401 has 8 divisors (see below), whose sum is σ = 1286161800. Its totient is φ = 1264131072.

The previous prime is 1275123391. The next prime is 1275123463. The reversal of 1275123401 is 1043215721.

It can be written as a sum of positive squares in 4 ways, for example, as 756195001 + 518928400 = 27499^2 + 22780^2 .

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 1275123401 - 2⁶ = 1275123337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1275123701) 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, 45275 + ... + 67823.

It is an arithmetic number, because the mean of its divisors is an integer number (160770225).

Almost surely, 2^1275123401 is an apocalyptic number.

It is an amenable number.

1275123401 is a deficient number, since it is larger than the sum of its proper divisors (11038399).

1275123401 is a wasteful number, since it uses less digits than its factorization.

1275123401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23035.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 1275123401 is about 35708.8700605326. The cubic root of 1275123401 is about 1084.3864245168.

The spelling of 1275123401 in words is "one billion, two hundred seventy-five million, one hundred twenty-three thousand, four hundred one".