126437 has 4 divisors (see below), whose sum is σ = 128640. Its totient is φ = 124236.

The previous prime is 126433. The next prime is 126443. The reversal of 126437 is 734621.

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 not a de Polignac number, because 126437 - 2² = 126433 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 1 + 2⁹ + 4⁴ + 6⁵ + 3⁵ + 7⁶ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126433) 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, 1013 + ... + 1130.

It is an arithmetic number, because the mean of its divisors is an integer number (32160).

2¹²⁶⁴³⁷ is an apocalyptic number.

It is an amenable number.

126437 is a deficient number, since it is larger than the sum of its proper divisors (2203).

126437 is an equidigital number, since it uses as much as digits as its factorization.

126437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2202.

The product of its digits is 1008, while the sum is 23.

The square root of 126437 is about 355.5798082006. The cubic root of 126437 is about 50.1908704423.

The spelling of 126437 in words is "one hundred twenty-six thousand, four hundred thirty-seven".