102741245 has 4 divisors (see below), whose sum is σ = 123289500. Its totient is φ = 82192992.

The previous prime is 102741181. The next prime is 102741257. The reversal of 102741245 is 542147201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 542147201 = 2113 ⋅256577.

It can be written as a sum of positive squares in 2 ways, for example, as 66765241 + 35976004 = 8171^2 + 5998^2 .

It is a cyclic number.

It is not a de Polignac number, because 102741245 - 2⁶ = 102741181 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10274120 + ... + 10274129.

It is an arithmetic number, because the mean of its divisors is an integer number (30822375).

Almost surely, 2^102741245 is an apocalyptic number.

It is an amenable number.

102741245 is a deficient number, since it is larger than the sum of its proper divisors (20548255).

102741245 is an equidigital number, since it uses as much as digits as its factorization.

102741245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20548254.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 102741245 is about 10136.1356048545. The cubic root of 102741245 is about 468.3619527462.

Adding to 102741245 its reverse (542147201), we get a palindrome (644888446).

The spelling of 102741245 in words is "one hundred two million, seven hundred forty-one thousand, two hundred forty-five".