75290405 has 8 divisors (see below), whose sum is σ = 91008792. Its totient is φ = 59792128.

The previous prime is 75290393. The next prime is 75290437. The reversal of 75290405 is 50409257.

It can be written as a sum of positive squares in 4 ways, for example, as 5166529 + 70123876 = 2273^2 + 8374^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75290405 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54272 + ... + 55641.

It is an arithmetic number, because the mean of its divisors is an integer number (11376099).

Almost surely, 2^75290405 is an apocalyptic number.

It is an amenable number.

75290405 is a deficient number, since it is larger than the sum of its proper divisors (15718387).

75290405 is a wasteful number, since it uses less digits than its factorization.

75290405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110055.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 75290405 is about 8677.0043793927. The cubic root of 75290405 is about 422.2599362152.

The spelling of 75290405 in words is "seventy-five million, two hundred ninety thousand, four hundred five".