102421147 has 4 divisors (see below), whose sum is σ = 102541240. Its totient is φ = 102301056.

The previous prime is 102421133. The next prime is 102421159. The reversal of 102421147 is 741124201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 741124201 = 79 ⋅9381319.

It is a cyclic number.

It is not a de Polignac number, because 102421147 - 2⁷ = 102421019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102428147) 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, 58758 + ... + 60475.

It is an arithmetic number, because the mean of its divisors is an integer number (25635310).

Almost surely, 2^102421147 is an apocalyptic number.

102421147 is a deficient number, since it is larger than the sum of its proper divisors (120093).

102421147 is an equidigital number, since it uses as much as digits as its factorization.

102421147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120092.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 102421147 is about 10120.3333443123. Note that the first 4 decimals coincide. The cubic root of 102421147 is about 467.8750412115.

Adding to 102421147 its reverse (741124201), we get a palindrome (843545348).

The spelling of 102421147 in words is "one hundred two million, four hundred twenty-one thousand, one hundred forty-seven".