126206871437 has 4 divisors (see below), whose sum is σ = 126480639516. Its totient is φ = 125933103360.

The previous prime is 126206871367. The next prime is 126206871451. The reversal of 126206871437 is 734178602621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 66507767881 + 59699103556 = 257891^2 + 244334^2 .

It is not a de Polignac number, because 126206871437 - 2¹⁸ = 126206609293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 126206871391 and 126206871400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126206871487) 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, 136883348 + ... + 136884269.

It is an arithmetic number, because the mean of its divisors is an integer number (31620159879).

Almost surely, 2^126206871437 is an apocalyptic number.

It is an amenable number.

126206871437 is a deficient number, since it is larger than the sum of its proper divisors (273768079).

126206871437 is an equidigital number, since it uses as much as digits as its factorization.

126206871437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273768078.

The product of its (nonzero) digits is 677376, while the sum is 47.

The spelling of 126206871437 in words is "one hundred twenty-six billion, two hundred six million, eight hundred seventy-one thousand, four hundred thirty-seven".