491156 has 6 divisors (see below), whose sum is σ = 859530. Its totient is φ = 245576.

The previous prime is 491149. The next prime is 491159. The reversal of 491156 is 651194.

It can be written as a sum of positive squares in only one way, i.e., 490000 + 1156 = 700^2 + 34^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61391 + ... + 61398.

It is an arithmetic number, because the mean of its divisors is an integer number (143255).

2⁴⁹¹¹⁵⁶ is an apocalyptic number.

It is an amenable number.

491156 is a deficient number, since it is larger than the sum of its proper divisors (368374).

491156 is a wasteful number, since it uses less digits than its factorization.

491156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122793 (or 122791 counting only the distinct ones).

The product of its digits is 1080, while the sum is 26.

The square root of 491156 is about 700.8252278564. The cubic root of 491156 is about 78.8993002048.

It can be divided in two parts, 49 and 1156, that multiplied together give a square (56644 = 238²).

The spelling of 491156 in words is "four hundred ninety-one thousand, one hundred fifty-six".