102145658 has 4 divisors (see below), whose sum is σ = 153218490. Its totient is φ = 51072828.

The previous prime is 102145633. The next prime is 102145661. The reversal of 102145658 is 856541201.

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., 101949409 + 196249 = 10097^2 + 443^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25536413 + ... + 25536416.

Almost surely, 2^102145658 is an apocalyptic number.

102145658 is a deficient number, since it is larger than the sum of its proper divisors (51072832).

102145658 is an equidigital number, since it uses as much as digits as its factorization.

102145658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51072831.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 102145658 is about 10106.7135113250. The cubic root of 102145658 is about 467.4551729541.

Adding to 102145658 its reverse (856541201), we get a palindrome (958686859).

The spelling of 102145658 in words is "one hundred two million, one hundred forty-five thousand, six hundred fifty-eight".