76123421 has 4 divisors (see below), whose sum is σ = 83043744. Its totient is φ = 69203100.

The previous prime is 76123403. The next prime is 76123427. The reversal of 76123421 is 12432167.

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 76123421 - 2¹⁴ = 76107037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76123427) 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, 3460145 + ... + 3460166.

It is an arithmetic number, because the mean of its divisors is an integer number (20760936).

Almost surely, 2^76123421 is an apocalyptic number.

It is an amenable number.

76123421 is a deficient number, since it is larger than the sum of its proper divisors (6920323).

76123421 is a wasteful number, since it uses less digits than its factorization.

76123421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6920322.

The product of its digits is 2016, while the sum is 26.

The square root of 76123421 is about 8724.8736953609. The cubic root of 76123421 is about 423.8115280926.

Adding to 76123421 its reverse (12432167), we get a palindrome (88555588).

The spelling of 76123421 in words is "seventy-six million, one hundred twenty-three thousand, four hundred twenty-one".