1269631 has 4 divisors (see below), whose sum is σ = 1385064. Its totient is φ = 1154200.

The previous prime is 1269601. The next prime is 1269641. The reversal of 1269631 is 1369621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1269631 - 2⁹ = 1269119 is a prime.

It is a super-2 number, since 2×1269631² = 3223925752322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1269631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1269601) 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, 57700 + ... + 57721.

It is an arithmetic number, because the mean of its divisors is an integer number (346266).

2^1269631 is an apocalyptic number.

1269631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1269631 is a deficient number, since it is larger than the sum of its proper divisors (115433).

1269631 is a wasteful number, since it uses less digits than its factorization.

1269631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115432.

The product of its digits is 1944, while the sum is 28.

The square root of 1269631 is about 1126.7790377887. The cubic root of 1269631 is about 108.2827240269.

The spelling of 1269631 in words is "one million, two hundred sixty-nine thousand, six hundred thirty-one".