102513542 has 4 divisors (see below), whose sum is σ = 153770316. Its totient is φ = 51256770.

The previous prime is 102513517. The next prime is 102513557. The reversal of 102513542 is 245315201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 245315201 = 2999 ⋅81799.

It is a congruent number.

It is an unprimeable number.

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, 25628384 + ... + 25628387.

It is an arithmetic number, because the mean of its divisors is an integer number (38442579).

Almost surely, 2^102513542 is an apocalyptic number.

102513542 is a deficient number, since it is larger than the sum of its proper divisors (51256774).

102513542 is an equidigital number, since it uses as much as digits as its factorization.

102513542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51256773.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 102513542 is about 10124.8971352799. The cubic root of 102513542 is about 468.0156902963.

Adding to 102513542 its reverse (245315201), we get a palindrome (347828743).

The spelling of 102513542 in words is "one hundred two million, five hundred thirteen thousand, five hundred forty-two".