400506261 has 8 divisors (see below), whose sum is σ = 534133344. Its totient is φ = 266941680.

The previous prime is 400506259. The next prime is 400506283. The reversal of 400506261 is 162605004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 400506261 - 2¹ = 400506259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400506361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2251 + ... + 28391.

It is an arithmetic number, because the mean of its divisors is an integer number (66766668).

Almost surely, 2^400506261 is an apocalyptic number.

It is an amenable number.

400506261 is a deficient number, since it is larger than the sum of its proper divisors (133627083).

400506261 is a wasteful number, since it uses less digits than its factorization.

400506261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31251.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 400506261 is about 20012.6525228416. The cubic root of 400506261 is about 737.1170155906.

The spelling of 400506261 in words is "four hundred million, five hundred six thousand, two hundred sixty-one".