121428065 has 8 divisors (see below), whose sum is σ = 158960448. Its totient is φ = 88311280.

The previous prime is 121428061. The next prime is 121428067. The reversal of 121428065 is 560824121.

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

It is not a de Polignac number, because 121428065 - 2² = 121428061 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121428061) 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, 1103837 + ... + 1103946.

It is an arithmetic number, because the mean of its divisors is an integer number (19870056).

Almost surely, 2^121428065 is an apocalyptic number.

It is an amenable number.

121428065 is a deficient number, since it is larger than the sum of its proper divisors (37532383).

121428065 is a wasteful number, since it uses less digits than its factorization.

121428065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2207799.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 121428065 is about 11019.4403215408. The cubic root of 121428065 is about 495.1913214790.

The spelling of 121428065 in words is "one hundred twenty-one million, four hundred twenty-eight thousand, sixty-five".