405726725 has 6 divisors (see below), whose sum is σ = 503101170.
Its totient is φ = 324581360.
The previous prime is 405726679. The next prime is 405726749. The reversal of 405726725 is 527627504.
It is a happy number.
It can be written as a sum of positive squares in 3 ways, for example, as 5166529 + 400560196 = 2273^2 + 20014^2
It is not a de Polignac number, because 405726725 - 26 = 405726661 is a prime.
It is a super-2 number, since 2×4057267252 = 329228350758451250, which contains 22 as substring.
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8114510 + ... + 8114559.
It is an arithmetic number, because the mean of its divisors is an integer number (83850195).
Almost surely, 2405726725 is an apocalyptic number.
It is an amenable number.
405726725 is a deficient number, since it is larger than the sum of its proper divisors (97374445).
405726725 is a wasteful number, since it uses less digits than its factorization.
405726725 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 16229079 (or 16229074 counting only the distinct ones).
The product of its (nonzero) digits is 117600, while the sum is 38.
The square root of 405726725 is about 20142.6593328686.
The cubic root of 405726725 is about 740.3058907036.
The spelling of 405726725 in words is "four hundred five million, seven hundred twenty-six thousand, seven hundred twenty-five".