505415401 has 2 divisors, whose sum is σ = 505415402. Its totient is φ = 505415400.

The previous prime is 505415399. The next prime is 505415411. The reversal of 505415401 is 104514505.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 452838400 + 52577001 = 21280^2 + 7251^2 .

It is a cyclic number.

It is not a de Polignac number, because 505415401 - 2¹ = 505415399 is a prime.

Together with 505415399, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (505415411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252707700 + 252707701.

It is an arithmetic number, because the mean of its divisors is an integer number (252707701).

Almost surely, 2^505415401 is an apocalyptic number.

It is an amenable number.

505415401 is a deficient number, since it is larger than the sum of its proper divisors (1).

505415401 is an equidigital number, since it uses as much as digits as its factorization.

505415401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 505415401 is about 22481.4457052922. The cubic root of 505415401 is about 796.5557137507. Note that the first 3 decimals are identical.

Adding to 505415401 its reverse (104514505), we get a palindrome (609929906).

The spelling of 505415401 in words is "five hundred five million, four hundred fifteen thousand, four hundred one".