145557101 has 2 divisors, whose sum is σ = 145557102. Its totient is φ = 145557100.

The previous prime is 145557091. The next prime is 145557103. The reversal of 145557101 is 101755541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74407876 + 71149225 = 8626^2 + 8435^2 .

It is an emirp because it is prime and its reverse (101755541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145557101 - 2⁶ = 145557037 is a prime.

Together with 145557103, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145557103) 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 as a sum of consecutive naturals, namely, 72778550 + 72778551.

It is an arithmetic number, because the mean of its divisors is an integer number (72778551).

Almost surely, 2^145557101 is an apocalyptic number.

145557101 is the 5396-th centered decagonal number.

It is an amenable number.

145557101 is a deficient number, since it is larger than the sum of its proper divisors (1).

145557101 is an equidigital number, since it uses as much as digits as its factorization.

145557101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3500, while the sum is 29.

The square root of 145557101 is about 12064.7047622393. The cubic root of 145557101 is about 526.0307501769.

The spelling of 145557101 in words is "one hundred forty-five million, five hundred fifty-seven thousand, one hundred one".