1388429 has 4 divisors (see below), whose sum is σ = 1586784. Its totient is φ = 1190076.

The previous prime is 1388419. The next prime is 1388449. The reversal of 1388429 is 9248831.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9248831 = 1511 ⋅6121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1388429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388419) 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, 99167 + ... + 99180.

It is an arithmetic number, because the mean of its divisors is an integer number (396696).

2^1388429 is an apocalyptic number.

It is an amenable number.

1388429 is a deficient number, since it is larger than the sum of its proper divisors (198355).

1388429 is an equidigital number, since it uses as much as digits as its factorization.

1388429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198354.

The product of its digits is 13824, while the sum is 35.

The square root of 1388429 is about 1178.3161714922. The cubic root of 1388429 is about 111.5598423966.

The spelling of 1388429 in words is "one million, three hundred eighty-eight thousand, four hundred twenty-nine".