1421398 has 8 divisors (see below), whose sum is σ = 2325960. Its totient is φ = 646080.

The previous prime is 1421389. The next prime is 1421401. The reversal of 1421398 is 8931241.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32283 + ... + 32326.

It is an arithmetic number, because the mean of its divisors is an integer number (290745).

2^1421398 is an apocalyptic number.

1421398 is a deficient number, since it is larger than the sum of its proper divisors (904562).

1421398 is a wasteful number, since it uses less digits than its factorization.

1421398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64622.

The product of its digits is 1728, while the sum is 28.

The square root of 1421398 is about 1192.2239722468. The cubic root of 1421398 is about 112.4359602606.

It can be divided in two parts, 142 and 1398, that added together give a triangular number (1540 = T₅₅).

The spelling of 1421398 in words is "one million, four hundred twenty-one thousand, three hundred ninety-eight".