1275984057 has 4 divisors (see below), whose sum is σ = 1701312080. Its totient is φ = 850656036.

The previous prime is 1275984053. The next prime is 1275984071. The reversal of 1275984057 is 7504895721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1275984057 - 2² = 1275984053 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1275983997 and 1275984015.

It is not an unprimeable number, because it can be changed into a prime (1275984053) 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, 212664007 + ... + 212664012.

It is an arithmetic number, because the mean of its divisors is an integer number (425328020).

Almost surely, 2^1275984057 is an apocalyptic number.

It is an amenable number.

1275984057 is a deficient number, since it is larger than the sum of its proper divisors (425328023).

1275984057 is an equidigital number, since it uses as much as digits as its factorization.

1275984057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425328022.

The product of its (nonzero) digits is 705600, while the sum is 48.

The square root of 1275984057 is about 35720.9190391289. The cubic root of 1275984057 is about 1084.6303417681.

The spelling of 1275984057 in words is "one billion, two hundred seventy-five million, nine hundred eighty-four thousand, fifty-seven".