1389651 has 8 divisors (see below), whose sum is σ = 1916880. Its totient is φ = 894432.

The previous prime is 1389643. The next prime is 1389667. The reversal of 1389651 is 1569831.

1389651 is an esthetic number in base 5, because in such base its adjacent digits differ by 1.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1389651 - 2³ = 1389643 is a prime.

It is a super-2 number, since 2×1389651² = 3862259803602, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1389251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7900 + ... + 8073.

It is an arithmetic number, because the mean of its divisors is an integer number (239610).

2^1389651 is an apocalyptic number.

1389651 is a deficient number, since it is larger than the sum of its proper divisors (527229).

1389651 is a wasteful number, since it uses less digits than its factorization.

1389651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16005.

The product of its digits is 6480, while the sum is 33.

The square root of 1389651 is about 1178.8345939953. The cubic root of 1389651 is about 111.5925619071.

The spelling of 1389651 in words is "one million, three hundred eighty-nine thousand, six hundred fifty-one".