1261514645012 has 24 divisors (see below), whose sum is σ = 2262483026496. Its totient is φ = 615136269888.

The previous prime is 1261514645003. The next prime is 1261514645057. The reversal of 1261514645012 is 2105464151621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5556713 + ... + 5779280.

It is an arithmetic number, because the mean of its divisors is an integer number (94270126104).

Almost surely, 2^{1261514645012} is an apocalyptic number.

It is an amenable number.

1261514645012 is a deficient number, since it is larger than the sum of its proper divisors (1000968381484).

1261514645012 is a wasteful number, since it uses less digits than its factorization.

1261514645012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11336687 (or 11336685 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 38.

Adding to 1261514645012 its reverse (2105464151621), we get a palindrome (3366978796633).

The spelling of 1261514645012 in words is "one trillion, two hundred sixty-one billion, five hundred fourteen million, six hundred forty-five thousand, twelve".