102140421 has 8 divisors (see below), whose sum is σ = 136379520. Its totient is φ = 67997472.

The previous prime is 102140393. The next prime is 102140429. The reversal of 102140421 is 124041201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102140421 - 2⁷ = 102140293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102140421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102140429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21520 + ... + 25833.

It is an arithmetic number, because the mean of its divisors is an integer number (17047440).

Almost surely, 2^102140421 is an apocalyptic number.

It is an amenable number.

102140421 is a deficient number, since it is larger than the sum of its proper divisors (34239099).

102140421 is an equidigital number, since it uses as much as digits as its factorization.

102140421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48075.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 102140421 is about 10106.4544227934. The cubic root of 102140421 is about 467.4471840206.

Adding to 102140421 its reverse (124041201), we get a palindrome (226181622).

The spelling of 102140421 in words is "one hundred two million, one hundred forty thousand, four hundred twenty-one".