122145428 has 6 divisors (see below), whose sum is σ = 213754506. Its totient is φ = 61072712.

The previous prime is 122145427. The next prime is 122145467. The reversal of 122145428 is 824541221.

It can be written as a sum of positive squares in only one way, i.e., 71707024 + 50438404 = 8468^2 + 7102^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 122145428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122145427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15268175 + ... + 15268182.

It is an arithmetic number, because the mean of its divisors is an integer number (35625751).

Almost surely, 2^122145428 is an apocalyptic number.

It is an amenable number.

122145428 is a deficient number, since it is larger than the sum of its proper divisors (91609078).

122145428 is a wasteful number, since it uses less digits than its factorization.

122145428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30536361 (or 30536359 counting only the distinct ones).

The product of its digits is 5120, while the sum is 29.

The square root of 122145428 is about 11051.9422727410. The cubic root of 122145428 is about 496.1645579983.

Adding to 122145428 its reverse (824541221), we get a palindrome (946686649).

The spelling of 122145428 in words is "one hundred twenty-two million, one hundred forty-five thousand, four hundred twenty-eight".