1311629 has 16 divisors (see below), whose sum is σ = 1520640. Its totient is φ = 1120560.

The previous prime is 1311623. The next prime is 1311643. The reversal of 1311629 is 9261131.

1311629 = T₂₂ + T₂₃ + ... + T₁₉₈.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1311629 - 2¹⁶ = 1246093 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22202 + ... + 22260.

It is an arithmetic number, because the mean of its divisors is an integer number (95040).

2^1311629 is an apocalyptic number.

It is an amenable number.

1311629 is a deficient number, since it is larger than the sum of its proper divisors (209011).

1311629 is a wasteful number, since it uses less digits than its factorization.

1311629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160.

The product of its digits is 324, while the sum is 23.

The square root of 1311629 is about 1145.2637250869. The cubic root of 1311629 is about 109.4637537017.

The spelling of 1311629 in words is "one million, three hundred eleven thousand, six hundred twenty-nine".