75757121 has 16 divisors (see below), whose sum is σ = 84870720. Its totient is φ = 67038720.

The previous prime is 75757109. The next prime is 75757127. The reversal of 75757121 is 12175757.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 75757121 - 2⁶ = 75757057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (75757127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72821 + ... + 73853.

It is an arithmetic number, because the mean of its divisors is an integer number (5304420).

Almost surely, 2^75757121 is an apocalyptic number.

It is an amenable number.

75757121 is a deficient number, since it is larger than the sum of its proper divisors (9113599).

75757121 is a wasteful number, since it uses less digits than its factorization.

75757121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216.

The product of its digits is 17150, while the sum is 35.

The square root of 75757121 is about 8703.8566739119. The cubic root of 75757121 is about 423.1306520761.

The spelling of 75757121 in words is "seventy-five million, seven hundred fifty-seven thousand, one hundred twenty-one".