787421 has 8 divisors (see below), whose sum is σ = 816480. Its totient is φ = 758992.

The previous prime is 787361. The next prime is 787427. The reversal of 787421 is 124787.

787421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 787421 - 2⁶ = 787357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (787427) 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, 4310 + ... + 4488.

It is an arithmetic number, because the mean of its divisors is an integer number (102060).

2⁷⁸⁷⁴²¹ is an apocalyptic number.

It is an amenable number.

787421 is a deficient number, since it is larger than the sum of its proper divisors (29059).

787421 is a wasteful number, since it uses less digits than its factorization.

787421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315.

The product of its digits is 3136, while the sum is 29.

The square root of 787421 is about 887.3674548912. The cubic root of 787421 is about 92.3426494558.

The spelling of 787421 in words is "seven hundred eighty-seven thousand, four hundred twenty-one".