126057213461 has 4 divisors (see below), whose sum is σ = 126512293932. Its totient is φ = 125602132992.

The previous prime is 126057213409. The next prime is 126057213521. The reversal of 126057213461 is 164312750621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 164312750621 = 4373 ⋅37574377.

It can be written as a sum of positive squares in 2 ways, for example, as 11346297361 + 114710916100 = 106519^2 + 338690^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126057213461 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126057215461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227539820 + ... + 227540373.

It is an arithmetic number, because the mean of its divisors is an integer number (31628073483).

Almost surely, 2^126057213461 is an apocalyptic number.

It is an amenable number.

126057213461 is a deficient number, since it is larger than the sum of its proper divisors (455080471).

126057213461 is an equidigital number, since it uses as much as digits as its factorization.

126057213461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455080470.

The product of its (nonzero) digits is 60480, while the sum is 38.

The spelling of 126057213461 in words is "one hundred twenty-six billion, fifty-seven million, two hundred thirteen thousand, four hundred sixty-one".