1399420 has 24 divisors (see below), whose sum is σ = 3206448. Its totient is φ = 508800.

The previous prime is 1399417. The next prime is 1399427. The reversal of 1399420 is 249931.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399427) 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, 2961 + ... + 3400.

It is an arithmetic number, because the mean of its divisors is an integer number (133602).

2^1399420 is an apocalyptic number.

1399420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1399420 is an abundant number, since it is smaller than the sum of its proper divisors (1807028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1399420 is a wasteful number, since it uses less digits than its factorization.

1399420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6381 (or 6379 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 1399420 is about 1182.9708364960. The cubic root of 1399420 is about 111.8534435127.

It can be divided in two parts, 139 and 9420, that added together give a palindrome (9559).

The spelling of 1399420 in words is "one million, three hundred ninety-nine thousand, four hundred twenty".