122740145 has 16 divisors (see below), whose sum is σ = 160909632. Its totient is φ = 89136960.

The previous prime is 122740139. The next prime is 122740147. The reversal of 122740145 is 541047221.

It is not a de Polignac number, because 122740145 - 2¹⁰ = 122739121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122740147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54614 + ... + 56816.

It is an arithmetic number, because the mean of its divisors is an integer number (10056852).

Almost surely, 2^122740145 is an apocalyptic number.

It is an amenable number.

122740145 is a deficient number, since it is larger than the sum of its proper divisors (38169487).

122740145 is a wasteful number, since it uses less digits than its factorization.

122740145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3232.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 122740145 is about 11078.8151442291. The cubic root of 122740145 is about 496.9685173715.

Adding to 122740145 its reverse (541047221), we get a palindrome (663787366).

The spelling of 122740145 in words is "one hundred twenty-two million, seven hundred forty thousand, one hundred forty-five".