787851 has 6 divisors (see below), whose sum is σ = 1138020. Its totient is φ = 525228.

The previous prime is 787837. The next prime is 787879. The reversal of 787851 is 158787.

It is not a de Polignac number, because 787851 - 2¹¹ = 785803 is a prime.

787851 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (787811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43761 + ... + 43778.

It is an arithmetic number, because the mean of its divisors is an integer number (189670).

2⁷⁸⁷⁸⁵¹ is an apocalyptic number.

787851 is a deficient number, since it is larger than the sum of its proper divisors (350169).

787851 is a wasteful number, since it uses less digits than its factorization.

787851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87545 (or 87542 counting only the distinct ones).

The product of its digits is 15680, while the sum is 36.

The square root of 787851 is about 887.6097115287. The cubic root of 787851 is about 92.3594554227.

The spelling of 787851 in words is "seven hundred eighty-seven thousand, eight hundred fifty-one".