77235121 has 4 divisors (see below), whose sum is σ = 78387952. Its totient is φ = 76082292.

The previous prime is 77235113. The next prime is 77235139. The reversal of 77235121 is 12153277.

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: 12153277 = 223 ⋅54499.

It is a cyclic number.

It is not a de Polignac number, because 77235121 - 2³ = 77235113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77235121.

It is not an unprimeable number, because it can be changed into a prime (77235421) 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, 576315 + ... + 576448.

It is an arithmetic number, because the mean of its divisors is an integer number (19596988).

Almost surely, 2^77235121 is an apocalyptic number.

It is an amenable number.

77235121 is a deficient number, since it is larger than the sum of its proper divisors (1152831).

77235121 is a wasteful number, since it uses less digits than its factorization.

77235121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152830.

The product of its digits is 2940, while the sum is 28.

The square root of 77235121 is about 8788.3514381254. The cubic root of 77235121 is about 425.8646682322.

Adding to 77235121 its reverse (12153277), we get a palindrome (89388398).

The spelling of 77235121 in words is "seventy-seven million, two hundred thirty-five thousand, one hundred twenty-one".