75377121 has 4 divisors (see below), whose sum is σ = 100502832. Its totient is φ = 50251412.

The previous prime is 75377117. The next prime is 75377153. The reversal of 75377121 is 12177357.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12177357 = 3 ⋅4059119.

It is a cyclic number.

It is not a de Polignac number, because 75377121 - 2² = 75377117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (75377101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12562851 + ... + 12562856.

It is an arithmetic number, because the mean of its divisors is an integer number (25125708).

Almost surely, 2^75377121 is an apocalyptic number.

It is an amenable number.

75377121 is a deficient number, since it is larger than the sum of its proper divisors (25125711).

75377121 is a wasteful number, since it uses less digits than its factorization.

75377121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25125710.

The product of its digits is 10290, while the sum is 33.

The square root of 75377121 is about 8681.9998272287. Note that the first 3 decimals coincide. The cubic root of 75377121 is about 422.4219871600.

The spelling of 75377121 in words is "seventy-five million, three hundred seventy-seven thousand, one hundred twenty-one".