1275921039 has 8 divisors (see below), whose sum is σ = 1702293120. Its totient is φ = 850081496.

The previous prime is 1275921013. The next prime is 1275921071. The reversal of 1275921039 is 9301295721.

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 1275921039 - 2¹⁹ = 1275396751 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1275920988 and 1275921006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275921089) 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, 127509 + ... + 137150.

It is an arithmetic number, because the mean of its divisors is an integer number (212786640).

Almost surely, 2^1275921039 is an apocalyptic number.

1275921039 is a deficient number, since it is larger than the sum of its proper divisors (426372081).

1275921039 is a wasteful number, since it uses less digits than its factorization.

1275921039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266269.

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 1275921039 is about 35720.0369400705. The cubic root of 1275921039 is about 1084.6124856515.

The spelling of 1275921039 in words is "one billion, two hundred seventy-five million, nine hundred twenty-one thousand, thirty-nine".