102420587 has 4 divisors (see below), whose sum is σ = 106873680. Its totient is φ = 97967496.

The previous prime is 102420557. The next prime is 102420611. The reversal of 102420587 is 785024201.

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

It is a cyclic number.

It is not a de Polignac number, because 102420587 - 2⁶ = 102420523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102420557) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 2226512 + ... + 2226557.

It is an arithmetic number, because the mean of its divisors is an integer number (26718420).

Almost surely, 2^102420587 is an apocalyptic number.

102420587 is a deficient number, since it is larger than the sum of its proper divisors (4453093).

102420587 is an equidigital number, since it uses as much as digits as its factorization.

102420587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4453092.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 102420587 is about 10120.3056772017. The cubic root of 102420587 is about 467.8741884888.

Adding to 102420587 its reverse (785024201), we get a palindrome (887444788).

The spelling of 102420587 in words is "one hundred two million, four hundred twenty thousand, five hundred eighty-seven".