145556417 has 2 divisors, whose sum is σ = 145556418. Its totient is φ = 145556416.

The previous prime is 145556393. The next prime is 145556429. The reversal of 145556417 is 714655541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77510416 + 68046001 = 8804^2 + 8249^2 .

It is a cyclic number.

It is not a de Polignac number, because 145556417 - 2¹⁴ = 145540033 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (145556447) by changing a digit.

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, 72778208 + 72778209.

It is an arithmetic number, because the mean of its divisors is an integer number (72778209).

Almost surely, 2^145556417 is an apocalyptic number.

It is an amenable number.

145556417 is a deficient number, since it is larger than the sum of its proper divisors (1).

145556417 is an equidigital number, since it uses as much as digits as its factorization.

145556417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84000, while the sum is 38.

The square root of 145556417 is about 12064.6764150556. The cubic root of 145556417 is about 526.0299262034.

The spelling of 145556417 in words is "one hundred forty-five million, five hundred fifty-six thousand, four hundred seventeen".