400001545 has 8 divisors (see below), whose sum is σ = 480110400. Its totient is φ = 319928880.

The previous prime is 400001543. The next prime is 400001603. The reversal of 400001545 is 545100004.

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

It is not a de Polignac number, because 400001545 - 2¹ = 400001543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400001543) 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, 33300 + ... + 43690.

It is an arithmetic number, because the mean of its divisors is an integer number (60013800).

Almost surely, 2^400001545 is an apocalyptic number.

It is an amenable number.

400001545 is a deficient number, since it is larger than the sum of its proper divisors (80108855).

400001545 is a wasteful number, since it uses less digits than its factorization.

400001545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18095.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 400001545 is about 20000.0386249627. The cubic root of 400001545 is about 736.8072483650.

Adding to 400001545 its reverse (545100004), we get a palindrome (945101549).

The spelling of 400001545 in words is "four hundred million, one thousand, five hundred forty-five".