121422145 has 8 divisors (see below), whose sum is σ = 156914856. Its totient is φ = 89665536.

The previous prime is 121422127. The next prime is 121422151. The reversal of 121422145 is 541224121.

It can be written as a sum of positive squares in 4 ways, for example, as 6589489 + 114832656 = 2567^2 + 10716^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 121422145 - 2⁵ = 121422113 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 933952 + ... + 934081.

It is an arithmetic number, because the mean of its divisors is an integer number (19614357).

Almost surely, 2^121422145 is an apocalyptic number.

It is an amenable number.

121422145 is a deficient number, since it is larger than the sum of its proper divisors (35492711).

121422145 is a wasteful number, since it uses less digits than its factorization.

121422145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1868051.

The product of its digits is 640, while the sum is 22.

The square root of 121422145 is about 11019.1717020836. The cubic root of 121422145 is about 495.1832739702.

Adding to 121422145 its reverse (541224121), we get a palindrome (662646266).

The spelling of 121422145 in words is "one hundred twenty-one million, four hundred twenty-two thousand, one hundred forty-five".