771231 has 4 divisors (see below), whose sum is σ = 1028312. Its totient is φ = 514152.

The previous prime is 771227. The next prime is 771233. The reversal of 771231 is 132177.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132177 = 3 ⋅44059.

It is not a de Polignac number, because 771231 - 2² = 771227 is a prime.

It is a super-2 number, since 2×771231² = 1189594510722, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 771198 and 771207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (771233) 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, 128536 + ... + 128541.

It is an arithmetic number, because the mean of its divisors is an integer number (257078).

2⁷⁷¹²³¹ is an apocalyptic number.

771231 is a deficient number, since it is larger than the sum of its proper divisors (257081).

771231 is a wasteful number, since it uses less digits than its factorization.

771231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257080.

The product of its digits is 294, while the sum is 21.

The square root of 771231 is about 878.1975859680. The cubic root of 771231 is about 91.7053823604.

The spelling of 771231 in words is "seven hundred seventy-one thousand, two hundred thirty-one".