401340545 has 4 divisors (see below), whose sum is σ = 481608660. Its totient is φ = 321072432.

The previous prime is 401340529. The next prime is 401340551. The reversal of 401340545 is 545043104.

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 219306481 + 182034064 = 14809^2 + 13492^2 .

It is a cyclic number.

It is not a de Polignac number, because 401340545 - 2⁴ = 401340529 is a prime.

It is a super-2 number, since 2×401340545² = 322148466121794050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40134050 + ... + 40134059.

It is an arithmetic number, because the mean of its divisors is an integer number (120402165).

Almost surely, 2^401340545 is an apocalyptic number.

It is an amenable number.

401340545 is a deficient number, since it is larger than the sum of its proper divisors (80268115).

401340545 is an equidigital number, since it uses as much as digits as its factorization.

401340545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80268114.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 401340545 is about 20033.4855928767. The cubic root of 401340545 is about 737.6284835998.

Adding to 401340545 its reverse (545043104), we get a palindrome (946383649).

The spelling of 401340545 in words is "four hundred one million, three hundred forty thousand, five hundred forty-five".