1260515128 has 8 divisors (see below), whose sum is σ = 2363465880. Its totient is φ = 630257560.

The previous prime is 1260515093. The next prime is 1260515129. The reversal of 1260515128 is 8215150621.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1260515128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1260515129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78782188 + ... + 78782203.

It is an arithmetic number, because the mean of its divisors is an integer number (295433235).

Almost surely, 2^1260515128 is an apocalyptic number.

It is an amenable number.

1260515128 is a deficient number, since it is larger than the sum of its proper divisors (1102950752).

1260515128 is a wasteful number, since it uses less digits than its factorization.

1260515128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157564397 (or 157564393 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 31.

The square root of 1260515128 is about 35503.7340008062. The cubic root of 1260515128 is about 1080.2294688451.

Adding to 1260515128 its reverse (8215150621), we get a palindrome (9475665749).

The spelling of 1260515128 in words is "one billion, two hundred sixty million, five hundred fifteen thousand, one hundred twenty-eight".