75520001 has 8 divisors (see below), whose sum is σ = 80298504. Its totient is φ = 70778880.

The previous prime is 75519989. The next prime is 75520007. The reversal of 75520001 is 10002557.

It can be written as a sum of positive squares in 4 ways, for example, as 31629376 + 43890625 = 5624^2 + 6625^2 .

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 75520001 - 2²² = 71325697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75520007) 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, 5120 + ... + 13313.

It is an arithmetic number, because the mean of its divisors is an integer number (10037313).

Almost surely, 2^75520001 is an apocalyptic number.

It is an amenable number.

75520001 is a deficient number, since it is larger than the sum of its proper divisors (4778503).

75520001 is a wasteful number, since it uses less digits than its factorization.

75520001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18691.

The product of its (nonzero) digits is 350, while the sum is 20.

The square root of 75520001 is about 8690.2244504961. The cubic root of 75520001 is about 422.6887239692.

Adding to 75520001 its reverse (10002557), we get a palindrome (85522558).

The spelling of 75520001 in words is "seventy-five million, five hundred twenty thousand, one".