126216437 has 4 divisors (see below), whose sum is σ = 126246816. Its totient is φ = 126186060.

The previous prime is 126216427. The next prime is 126216457. The reversal of 126216437 is 734612621.

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 126216437 - 2¹⁶ = 126150901 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 (126216427) 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, 7739 + ... + 17672.

It is an arithmetic number, because the mean of its divisors is an integer number (31561704).

Almost surely, 2^126216437 is an apocalyptic number.

It is an amenable number.

126216437 is a deficient number, since it is larger than the sum of its proper divisors (30379).

126216437 is an equidigital number, since it uses as much as digits as its factorization.

126216437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30378.

The product of its digits is 12096, while the sum is 32.

The square root of 126216437 is about 11234.6088939491. The cubic root of 126216437 is about 501.6166830380.

The spelling of 126216437 in words is "one hundred twenty-six million, two hundred sixteen thousand, four hundred thirty-seven".