406544261 has 4 divisors (see below), whose sum is σ = 419658624. Its totient is φ = 393429900.

The previous prime is 406544213. The next prime is 406544269. The reversal of 406544261 is 162445604.

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 406544261 - 2¹⁸ = 406282117 is a prime.

It is a super-2 number, since 2×406544261² = 330556472304072242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406544269) 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, 6557135 + ... + 6557196.

It is an arithmetic number, because the mean of its divisors is an integer number (104914656).

Almost surely, 2^406544261 is an apocalyptic number.

It is an amenable number.

406544261 is a deficient number, since it is larger than the sum of its proper divisors (13114363).

406544261 is a wasteful number, since it uses less digits than its factorization.

406544261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13114362.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 406544261 is about 20162.9427663722. The cubic root of 406544261 is about 740.8027938529.

Adding to 406544261 its reverse (162445604), we get a palindrome (568989865).

It can be divided in two parts, 4065 and 44261, that multiplied together give a triangular number (179920965 = T₁₈₉₆₉).

The spelling of 406544261 in words is "four hundred six million, five hundred forty-four thousand, two hundred sixty-one".