102557245 has 12 divisors (see below), whose sum is σ = 143161884. Its totient is φ = 70324800.

The previous prime is 102557239. The next prime is 102557249. The reversal of 102557245 is 542755201.

It can be written as a sum of positive squares in 2 ways, for example, as 64352484 + 38204761 = 8022^2 + 6181^2 .

It is not a de Polignac number, because 102557245 - 2¹¹ = 102555197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102557249) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 209056 + ... + 209545.

It is an arithmetic number, because the mean of its divisors is an integer number (11930157).

Almost surely, 2^102557245 is an apocalyptic number.

It is an amenable number.

102557245 is a deficient number, since it is larger than the sum of its proper divisors (40604639).

102557245 is an equidigital number, since it uses as much as digits as its factorization.

102557245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418620 (or 418613 counting only the distinct ones).

The product of its (nonzero) digits is 14000, while the sum is 31.

The square root of 102557245 is about 10127.0551000772. The cubic root of 102557245 is about 468.0821881249.

The spelling of 102557245 in words is "one hundred two million, five hundred fifty-seven thousand, two hundred forty-five".