405442601 has 4 divisors (see below), whose sum is σ = 407182932. Its totient is φ = 403702272.

The previous prime is 405442579. The next prime is 405442603. The reversal of 405442601 is 106244504.

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 64080025 + 341362576 = 8005^2 + 18476^2 .

It is a cyclic number.

It is not a de Polignac number, because 405442601 - 2¹⁰ = 405441577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405442603) 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, 869816 + ... + 870281.

It is an arithmetic number, because the mean of its divisors is an integer number (101795733).

Almost surely, 2^405442601 is an apocalyptic number.

It is an amenable number.

405442601 is a deficient number, since it is larger than the sum of its proper divisors (1740331).

405442601 is a wasteful number, since it uses less digits than its factorization.

405442601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1740330.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 405442601 is about 20135.6053050312. The cubic root of 405442601 is about 740.1330421860.

The spelling of 405442601 in words is "four hundred five million, four hundred forty-two thousand, six hundred one".