102145619 has 4 divisors (see below), whose sum is σ = 102325080. Its totient is φ = 101966160.

The previous prime is 102145583. The next prime is 102145633. The reversal of 102145619 is 916541201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102145619 is a prime.

It is a super-2 number, since 2×102145619² = 20867454961786322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102145591 and 102145600.

It is not an unprimeable number, because it can be changed into a prime (102145699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88874 + ... + 90015.

It is an arithmetic number, because the mean of its divisors is an integer number (25581270).

Almost surely, 2^102145619 is an apocalyptic number.

102145619 is a deficient number, since it is larger than the sum of its proper divisors (179461).

102145619 is an equidigital number, since it uses as much as digits as its factorization.

102145619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179460.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 102145619 is about 10106.7115819143. The cubic root of 102145619 is about 467.4551134614.

The spelling of 102145619 in words is "one hundred two million, one hundred forty-five thousand, six hundred nineteen".