102660421 has 4 divisors (see below), whose sum is σ = 103960000. Its totient is φ = 101360844.

The previous prime is 102660379. The next prime is 102660427. The reversal of 102660421 is 124066201.

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.

It is a cyclic number.

It is not a de Polignac number, because 102660421 - 2¹³ = 102652229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102660392 and 102660401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102660427) 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, 649671 + ... + 649828.

It is an arithmetic number, because the mean of its divisors is an integer number (25990000).

Almost surely, 2^102660421 is an apocalyptic number.

It is an amenable number.

102660421 is a deficient number, since it is larger than the sum of its proper divisors (1299579).

102660421 is an equidigital number, since it uses as much as digits as its factorization.

102660421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299578.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 102660421 is about 10132.1478966703. The cubic root of 102660421 is about 468.2391042663.

The spelling of 102660421 in words is "one hundred two million, six hundred sixty thousand, four hundred twenty-one".