1387629 has 6 divisors (see below), whose sum is σ = 2004366. Its totient is φ = 925080.

The previous prime is 1387601. The next prime is 1387649. The reversal of 1387629 is 9267831.

It can be written as a sum of positive squares in only one way, i.e., 864900 + 522729 = 930^2 + 723^2 .

It is not a de Polignac number, because 1387629 - 2⁵ = 1387597 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1387593 and 1387602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77082 + ... + 77099.

It is an arithmetic number, because the mean of its divisors is an integer number (334061).

2^1387629 is an apocalyptic number.

It is an amenable number.

1387629 is a deficient number, since it is larger than the sum of its proper divisors (616737).

1387629 is a wasteful number, since it uses less digits than its factorization.

1387629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154187 (or 154184 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 1387629 is about 1177.9766551167. The cubic root of 1387629 is about 111.5384116955.

It can be divided in two parts, 1387 and 629, that added together give a triangular number (2016 = T₆₃).

The spelling of 1387629 in words is "one million, three hundred eighty-seven thousand, six hundred twenty-nine".