862688121 has 8 divisors (see below), whose sum is σ = 1154496384. Its totient is φ = 573002640.

The previous prime is 862688107. The next prime is 862688131. The reversal of 862688121 is 121886268.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 862688121 - 2⁵ = 862688089 is a prime.

It is a super-2 number, since 2×862688121² = 1488461588229021282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (862688131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 529746 + ... + 531371.

It is an arithmetic number, because the mean of its divisors is an integer number (144312048).

Almost surely, 2^862688121 is an apocalyptic number.

It is an amenable number.

862688121 is a deficient number, since it is larger than the sum of its proper divisors (291808263).

862688121 is a wasteful number, since it uses less digits than its factorization.

862688121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061391.

The product of its digits is 73728, while the sum is 42.

The square root of 862688121 is about 29371.5529211514. The cubic root of 862688121 is about 951.9583318774.

The spelling of 862688121 in words is "eight hundred sixty-two million, six hundred eighty-eight thousand, one hundred twenty-one".