405245000 has 40 divisors (see below), whose sum is σ = 949500750. Its totient is φ = 162096000.

The previous prime is 405244969. The next prime is 405245047. The reversal of 405245000 is 542504.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 5484964 + 399760036 = 2342^2 + 19994^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 35525 + ... + 45524.

Almost surely, 2^405245000 is an apocalyptic number.

405245000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

405245000 is an abundant number, since it is smaller than the sum of its proper divisors (544255750).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

405245000 is an equidigital number, since it uses as much as digits as its factorization.

405245000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81075 (or 81056 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 405245000 is about 20130.6979511392. The cubic root of 405245000 is about 740.0127828325.

Adding to 405245000 its reverse (542504), we get a palindrome (405787504).

The spelling of 405245000 in words is "four hundred five million, two hundred forty-five thousand".