405554261 has 16 divisors (see below), whose sum is σ = 491466240. Its totient is φ = 326695680.

The previous prime is 405554257. The next prime is 405554293. The reversal of 405554261 is 162455504.

It is a cyclic number.

It is not a de Polignac number, because 405554261 - 2² = 405554257 is a prime.

It is a super-2 number, since 2×405554261² = 328948517230512242, 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 (405551261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96596 + ... + 100706.

It is an arithmetic number, because the mean of its divisors is an integer number (30716640).

Almost surely, 2^405554261 is an apocalyptic number.

It is an amenable number.

405554261 is a deficient number, since it is larger than the sum of its proper divisors (85911979).

405554261 is a wasteful number, since it uses less digits than its factorization.

405554261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4964.

The product of its (nonzero) digits is 24000, while the sum is 32.

The square root of 405554261 is about 20138.3778145113. The cubic root of 405554261 is about 740.2009808368.

The spelling of 405554261 in words is "four hundred five million, five hundred fifty-four thousand, two hundred sixty-one".