1398642 has 16 divisors (see below), whose sum is σ = 3196992. Its totient is φ = 399600.

The previous prime is 1398623. The next prime is 1398659. The reversal of 1398642 is 2468931.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16609 + ... + 16692.

It is an arithmetic number, because the mean of its divisors is an integer number (199812).

2^1398642 is an apocalyptic number.

1398642 is an abundant number, since it is smaller than the sum of its proper divisors (1798350).

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

1398642 is a wasteful number, since it uses less digits than its factorization.

1398642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33313.

The product of its digits is 10368, while the sum is 33.

The square root of 1398642 is about 1182.6419576524. The cubic root of 1398642 is about 111.8327115641.

It can be divided in two parts, 13986 and 42, that added together give a triangular number (14028 = T₁₆₇).

The spelling of 1398642 in words is "one million, three hundred ninety-eight thousand, six hundred forty-two".