405274 has 4 divisors (see below), whose sum is σ = 607914. Its totient is φ = 202636.

The previous prime is 405269. The next prime is 405277. The reversal of 405274 is 472504.

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

It can be written as a sum of positive squares in only one way, i.e., 257049 + 148225 = 507^2 + 385^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (405277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101317 + ... + 101320.

2⁴⁰⁵²⁷⁴ is an apocalyptic number.

405274 is a deficient number, since it is larger than the sum of its proper divisors (202640).

405274 is a wasteful number, since it uses less digits than its factorization.

405274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202639.

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 405274 is about 636.6113414007. The cubic root of 405274 is about 74.0030434590.

Adding to 405274 its reverse (472504), we get a palindrome (877778).

The spelling of 405274 in words is "four hundred five thousand, two hundred seventy-four".