402727261 has 4 divisors (see below), whose sum is σ = 403998012. Its totient is φ = 401456512.

The previous prime is 402727223. The next prime is 402727279. The reversal of 402727261 is 162727204.

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

It can be written as a sum of positive squares in 2 ways, for example, as 166152100 + 236575161 = 12890^2 + 15381^2 .

It is a cyclic number.

It is not a de Polignac number, because 402727261 - 2¹⁹ = 402202973 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402727291) 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, 634900 + ... + 635533.

It is an arithmetic number, because the mean of its divisors is an integer number (100999503).

Almost surely, 2^402727261 is an apocalyptic number.

It is an amenable number.

402727261 is a deficient number, since it is larger than the sum of its proper divisors (1270751).

402727261 is a wasteful number, since it uses less digits than its factorization.

402727261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270750.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 402727261 is about 20068.0657015070. The cubic root of 402727261 is about 738.4770608652.

The spelling of 402727261 in words is "four hundred two million, seven hundred twenty-seven thousand, two hundred sixty-one".