1381929 has 4 divisors (see below), whose sum is σ = 1842576. Its totient is φ = 921284.

The previous prime is 1381921. The next prime is 1381967. The reversal of 1381929 is 9291831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1381929 - 2³ = 1381921 is a prime.

It is a super-2 number, since 2×1381929² = 3819455522082, which contains 22 as substring.

It is a D-number.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 1381929.

It is not an unprimeable number, because it can be changed into a prime (1381921) 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, 230319 + ... + 230324.

It is an arithmetic number, because the mean of its divisors is an integer number (460644).

2^1381929 is an apocalyptic number.

It is an amenable number.

1381929 is a deficient number, since it is larger than the sum of its proper divisors (460647).

1381929 is an equidigital number, since it uses as much as digits as its factorization.

1381929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460646.

The product of its digits is 3888, while the sum is 33.

The square root of 1381929 is about 1175.5547626546. The cubic root of 1381929 is about 111.3854790167.

The spelling of 1381929 in words is "one million, three hundred eighty-one thousand, nine hundred twenty-nine".