75036621 has 16 divisors (see below), whose sum is σ = 109762560. Its totient is φ = 45219120.

The previous prime is 75036617. The next prime is 75036631. The reversal of 75036621 is 12663057.

It is not a de Polignac number, because 75036621 - 2² = 75036617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75036631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 445 + ... + 12258.

It is an arithmetic number, because the mean of its divisors is an integer number (6860160).

Almost surely, 2^75036621 is an apocalyptic number.

It is an amenable number.

75036621 is a deficient number, since it is larger than the sum of its proper divisors (34725939).

75036621 is a wasteful number, since it uses less digits than its factorization.

75036621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12896.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 75036621 is about 8662.3680942338. The cubic root of 75036621 is about 421.7849600326.

Adding to 75036621 its reverse (12663057), we get a palindrome (87699678).

It can be divided in two parts, 75036 and 621, that added together give a palindrome (75657).

The spelling of 75036621 in words is "seventy-five million, thirty-six thousand, six hundred twenty-one".