145904212 has 6 divisors (see below), whose sum is σ = 255332378. Its totient is φ = 72952104.

The previous prime is 145904207. The next prime is 145904243. The reversal of 145904212 is 212409541.

It can be written as a sum of positive squares in only one way, i.e., 124411716 + 21492496 = 11154^2 + 4636^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18238023 + ... + 18238030.

Almost surely, 2^145904212 is an apocalyptic number.

It is an amenable number.

145904212 is a deficient number, since it is larger than the sum of its proper divisors (109428166).

145904212 is a wasteful number, since it uses less digits than its factorization.

145904212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36476057 (or 36476055 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 145904212 is about 12079.0815876042. The cubic root of 145904212 is about 526.4485612591.

The spelling of 145904212 in words is "one hundred forty-five million, nine hundred four thousand, two hundred twelve".