771138 has 12 divisors (see below), whose sum is σ = 1670838. Its totient is φ = 257040.

The previous prime is 771109. The next prime is 771143. The reversal of 771138 is 831177.

It can be written as a sum of positive squares in only one way, i.e., 514089 + 257049 = 717^2 + 507^2 .

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21403 + ... + 21438.

2⁷⁷¹¹³⁸ is an apocalyptic number.

771138 is an abundant number, since it is smaller than the sum of its proper divisors (899700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

771138 is a wasteful number, since it uses less digits than its factorization.

771138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42849 (or 42846 counting only the distinct ones).

The product of its digits is 1176, while the sum is 27.

The square root of 771138 is about 878.1446350118. The cubic root of 771138 is about 91.7016960704.

It can be divided in two parts, 771 and 138, that added together give a palindrome (909).

The spelling of 771138 in words is "seven hundred seventy-one thousand, one hundred thirty-eight".