75478621 has 8 divisors (see below), whose sum is σ = 79580000. Its totient is φ = 71390160.

The previous prime is 75478607. The next prime is 75478639. The reversal of 75478621 is 12687457.

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

It is a cyclic number.

It is not a de Polignac number, because 75478621 - 2⁷ = 75478493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75478021) 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, 10255 + ... + 16003.

It is an arithmetic number, because the mean of its divisors is an integer number (9947500).

Almost surely, 2^75478621 is an apocalyptic number.

It is an amenable number.

75478621 is a deficient number, since it is larger than the sum of its proper divisors (4101379).

75478621 is a wasteful number, since it uses less digits than its factorization.

75478621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6459.

The product of its digits is 94080, while the sum is 40.

The square root of 75478621 is about 8687.8432881815. The cubic root of 75478621 is about 422.6115079789.

The spelling of 75478621 in words is "seventy-five million, four hundred seventy-eight thousand, six hundred twenty-one".