102025421 has 4 divisors (see below), whose sum is σ = 107395200. Its totient is φ = 96655644.

The previous prime is 102025411. The next prime is 102025423. The reversal of 102025421 is 124520201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 124520201 = 13 ⋅9578477.

It is a cyclic number.

It is not a de Polignac number, because 102025421 - 2¹⁰ = 102024397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102025421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102025423) 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, 2684861 + ... + 2684898.

It is an arithmetic number, because the mean of its divisors is an integer number (26848800).

Almost surely, 2^102025421 is an apocalyptic number.

It is an amenable number.

102025421 is a deficient number, since it is larger than the sum of its proper divisors (5369779).

102025421 is an equidigital number, since it uses as much as digits as its factorization.

102025421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5369778.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 102025421 is about 10100.7633869921. The cubic root of 102025421 is about 467.2716850586.

Adding to 102025421 its reverse (124520201), we get a palindrome (226545622).

The spelling of 102025421 in words is "one hundred two million, twenty-five thousand, four hundred twenty-one".