126216401 has 4 divisors (see below), whose sum is σ = 126250404. Its totient is φ = 126182400.

The previous prime is 126216371. The next prime is 126216413. The reversal of 126216401 is 104612621.

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 80640400 + 45576001 = 8980^2 + 6751^2 .

It is a cyclic number.

It is not a de Polignac number, because 126216401 - 2¹⁴ = 126200017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126216001) 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, 10640 + ... + 19121.

It is an arithmetic number, because the mean of its divisors is an integer number (31562601).

Almost surely, 2^126216401 is an apocalyptic number.

It is an amenable number.

126216401 is a deficient number, since it is larger than the sum of its proper divisors (34003).

126216401 is an equidigital number, since it uses as much as digits as its factorization.

126216401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34002.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 126216401 is about 11234.6072917570. The cubic root of 126216401 is about 501.6166353469.

The spelling of 126216401 in words is "one hundred twenty-six million, two hundred sixteen thousand, four hundred one".