145626557 has 2 divisors, whose sum is σ = 145626558. Its totient is φ = 145626556.

The previous prime is 145626529. The next prime is 145626617. The reversal of 145626557 is 755626541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97337956 + 48288601 = 9866^2 + 6949^2 .

It is an emirp because it is prime and its reverse (755626541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145626557 - 2⁶ = 145626493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145626527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72813278 + 72813279.

It is an arithmetic number, because the mean of its divisors is an integer number (72813279).

Almost surely, 2^145626557 is an apocalyptic number.

It is an amenable number.

145626557 is a deficient number, since it is larger than the sum of its proper divisors (1).

145626557 is an equidigital number, since it uses as much as digits as its factorization.

145626557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 252000, while the sum is 41.

The square root of 145626557 is about 12067.5828979958. The cubic root of 145626557 is about 526.1144061940.

The spelling of 145626557 in words is "one hundred forty-five million, six hundred twenty-six thousand, five hundred fifty-seven".