1261452630101 has 8 divisors (see below), whose sum is σ = 1279505350200. Its totient is φ = 1243508990400.

The previous prime is 1261452630049. The next prime is 1261452630103. The reversal of 1261452630101 is 1010362541621.

It can be written as a sum of positive squares in 4 ways, for example, as 623706642001 + 637745988100 = 789751^2 + 798590^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1261452630101 - 2³⁸ = 986574723157 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 (1261452630103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27246806 + ... + 27293063.

It is an arithmetic number, because the mean of its divisors is an integer number (159938168775).

Almost surely, 2^{1261452630101} is an apocalyptic number.

It is an amenable number.

1261452630101 is a deficient number, since it is larger than the sum of its proper divisors (18052720099).

1261452630101 is a wasteful number, since it uses less digits than its factorization.

1261452630101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54540199.

The product of its (nonzero) digits is 8640, while the sum is 32.

The spelling of 1261452630101 in words is "one trillion, two hundred sixty-one billion, four hundred fifty-two million, six hundred thirty thousand, one hundred one".