102513442 has 4 divisors (see below), whose sum is σ = 153770166. Its totient is φ = 51256720.

The previous prime is 102513409. The next prime is 102513443. The reversal of 102513442 is 244315201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 101022601 + 1490841 = 10051^2 + 1221^2 .

It is not an unprimeable number, because it can be changed into a prime (102513443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25628359 + ... + 25628362.

Almost surely, 2^102513442 is an apocalyptic number.

102513442 is a deficient number, since it is larger than the sum of its proper divisors (51256724).

102513442 is an equidigital number, since it uses as much as digits as its factorization.

102513442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51256723.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 102513442 is about 10124.8921969570. The cubic root of 102513442 is about 468.0155381161.

Adding to 102513442 its reverse (244315201), we get a palindrome (346828643).

The spelling of 102513442 in words is "one hundred two million, five hundred thirteen thousand, four hundred forty-two".