406236451 has 4 divisors (see below), whose sum is σ = 407518272. Its totient is φ = 404954632.

The previous prime is 406236433. The next prime is 406236491. The reversal of 406236451 is 154632604.

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

It is a cyclic number.

It is not a de Polignac number, because 406236451 - 2⁹ = 406235939 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406236491) 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, 640435 + ... + 641068.

It is an arithmetic number, because the mean of its divisors is an integer number (101879568).

Almost surely, 2^406236451 is an apocalyptic number.

406236451 is a deficient number, since it is larger than the sum of its proper divisors (1281821).

406236451 is a wasteful number, since it uses less digits than its factorization.

406236451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281820.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 406236451 is about 20155.3082586201. The cubic root of 406236451 is about 740.6157833982.

It can be divided in two parts, 40623 and 6451, that added together give a palindrome (47074).

The spelling of 406236451 in words is "four hundred six million, two hundred thirty-six thousand, four hundred fifty-one".