1261243523114 has 16 divisors (see below), whose sum is σ = 1974257143488. Its totient is φ = 603161609952.

The previous prime is 1261243523081. The next prime is 1261243523131. The reversal of 1261243523114 is 4113253421621.

It is a Curzon 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, 274352 + ... + 1611755.

It is an arithmetic number, because the mean of its divisors is an integer number (123391071468).

Almost surely, 2^{1261243523114} is an apocalyptic number.

1261243523114 is a deficient number, since it is larger than the sum of its proper divisors (713013620374).

1261243523114 is a wasteful number, since it uses less digits than its factorization.

1261243523114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1900669.

The product of its digits is 34560, while the sum is 35.

Adding to 1261243523114 its reverse (4113253421621), we get a palindrome (5374496944735).

The spelling of 1261243523114 in words is "one trillion, two hundred sixty-one billion, two hundred forty-three million, five hundred twenty-three thousand, one hundred fourteen".