75672121 has 12 divisors (see below), whose sum is σ = 88369380. Its totient is φ = 64609440.

The previous prime is 75672119. The next prime is 75672127. The reversal of 75672121 is 12127657.

It can be written as a sum of positive squares in 2 ways, for example, as 18835600 + 56836521 = 4340^2 + 7539^2 .

It is not a de Polignac number, because 75672121 - 2¹ = 75672119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75672127) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 10311 + ... + 16051.

It is an arithmetic number, because the mean of its divisors is an integer number (7364115).

Almost surely, 2^75672121 is an apocalyptic number.

It is an amenable number.

75672121 is a deficient number, since it is larger than the sum of its proper divisors (12697259).

75672121 is a wasteful number, since it uses less digits than its factorization.

75672121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6024 (or 6017 counting only the distinct ones).

The product of its digits is 5880, while the sum is 31.

The square root of 75672121 is about 8698.9724105782. The cubic root of 75672121 is about 422.9723410388.

Adding to 75672121 its reverse (12127657), we get a palindrome (87799778).

The spelling of 75672121 in words is "seventy-five million, six hundred seventy-two thousand, one hundred twenty-one".