1631266 has 16 divisors (see below), whose sum is σ = 3011904. Its totient is φ = 645264.

The previous prime is 1631263. The next prime is 1631297. The reversal of 1631266 is 6621361.

It is a super-2 number, since 2×1631266² = 5322057525512, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1631266.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1631261) 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, 4300 + ... + 4663.

It is an arithmetic number, because the mean of its divisors is an integer number (188244).

2^1631266 is an apocalyptic number.

1631266 is a deficient number, since it is larger than the sum of its proper divisors (1380638).

1631266 is a wasteful number, since it uses less digits than its factorization.

1631266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8985.

The product of its digits is 1296, while the sum is 25.

The square root of 1631266 is about 1277.2102411115. The cubic root of 1631266 is about 117.7176530138.

It can be divided in two parts, 1631 and 266, that multiplied together give a triangular number (433846 = T₉₃₁).

The spelling of 1631266 in words is "one million, six hundred thirty-one thousand, two hundred sixty-six".