407555261 has 4 divisors (see below), whose sum is σ = 408243132. Its totient is φ = 406867392.

The previous prime is 407555249. The next prime is 407555273. The reversal of 407555261 is 162555704.

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

It is an interprime number because it is at equal distance from previous prime (407555249) and next prime (407555273).

It can be written as a sum of positive squares in 2 ways, for example, as 361722361 + 45832900 = 19019^2 + 6770^2 .

It is a cyclic number.

It is not a de Polignac number, because 407555261 - 2¹⁴ = 407538877 is a prime.

It is a super-2 number, since 2×407555261² = 332202581537556242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (407555221) 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, 343046 + ... + 344231.

It is an arithmetic number, because the mean of its divisors is an integer number (102060783).

Almost surely, 2^407555261 is an apocalyptic number.

It is an amenable number.

407555261 is a deficient number, since it is larger than the sum of its proper divisors (687871).

407555261 is an equidigital number, since it uses as much as digits as its factorization.

407555261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687870.

The product of its (nonzero) digits is 42000, while the sum is 35.

The square root of 407555261 is about 20187.9979443233. The cubic root of 407555261 is about 741.4163651317.

The spelling of 407555261 in words is "four hundred seven million, five hundred fifty-five thousand, two hundred sixty-one".