145404122 has 16 divisors (see below), whose sum is σ = 227648232. Its totient is φ = 69588480.

The previous prime is 145404121. The next prime is 145404139. The reversal of 145404122 is 221404541.

It can be written as a sum of positive squares in 4 ways, for example, as 95433361 + 49970761 = 9769^2 + 7069^2 .

It is a super-2 number, since 2×145404122² = 42284717389181768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145404121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12383 + ... + 21074.

Almost surely, 2^145404122 is an apocalyptic number.

145404122 is a deficient number, since it is larger than the sum of its proper divisors (82244110).

145404122 is a wasteful number, since it uses less digits than its factorization.

145404122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33553.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 145404122 is about 12058.3631559180. The cubic root of 145404122 is about 525.8464012956.

Adding to 145404122 its reverse (221404541), we get a palindrome (366808663).

The spelling of 145404122 in words is "one hundred forty-five million, four hundred four thousand, one hundred twenty-two".