102768421 has 4 divisors (see below), whose sum is σ = 117449632. Its totient is φ = 88087212.

The previous prime is 102768377. The next prime is 102768437. The reversal of 102768421 is 124867201.

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: 124867201 = 2063 ⋅60527.

It is a cyclic number.

It is not a de Polignac number, because 102768421 - 2¹¹ = 102766373 is a prime.

It is a super-2 number, since 2×102768421² = 21122696709666482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102768481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7340595 + ... + 7340608.

It is an arithmetic number, because the mean of its divisors is an integer number (29362408).

Almost surely, 2^102768421 is an apocalyptic number.

It is an amenable number.

102768421 is a deficient number, since it is larger than the sum of its proper divisors (14681211).

102768421 is an equidigital number, since it uses as much as digits as its factorization.

102768421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14681210.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 102768421 is about 10137.4760665562. The cubic root of 102768421 is about 468.4032444473.

The spelling of 102768421 in words is "one hundred two million, seven hundred sixty-eight thousand, four hundred twenty-one".