1246120511261 has 4 divisors (see below), whose sum is σ = 1246218868224. Its totient is φ = 1246022154300.

The previous prime is 1246120511243. The next prime is 1246120511281. The reversal of 1246120511261 is 1621150216421.

It is a happy number.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1246120511261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1246120511281) 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, 49159475 + ... + 49184816.

It is an arithmetic number, because the mean of its divisors is an integer number (311554717056).

Almost surely, 2^{1246120511261} is an apocalyptic number.

It is an amenable number.

1246120511261 is a deficient number, since it is larger than the sum of its proper divisors (98356963).

1246120511261 is an equidigital number, since it uses as much as digits as its factorization.

1246120511261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98356962.

The product of its (nonzero) digits is 5760, while the sum is 32.

Adding to 1246120511261 its reverse (1621150216421), we get a palindrome (2867270727682).

The spelling of 1246120511261 in words is "one trillion, two hundred forty-six billion, one hundred twenty million, five hundred eleven thousand, two hundred sixty-one".