321404942 has 4 divisors (see below), whose sum is σ = 482107416. Its totient is φ = 160702470.

The previous prime is 321404887. The next prime is 321404947. The reversal of 321404942 is 249404123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 249404123 = 1259 ⋅198097.

It is a super-2 number, since 2×321404942² = 206602273484046728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321404947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80351234 + ... + 80351237.

It is an arithmetic number, because the mean of its divisors is an integer number (120526854).

Almost surely, 2^321404942 is an apocalyptic number.

321404942 is a deficient number, since it is larger than the sum of its proper divisors (160702474).

321404942 is a wasteful number, since it uses less digits than its factorization.

321404942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160702473.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 321404942 is about 17927.7701346263. The cubic root of 321404942 is about 684.9899243727.

The spelling of 321404942 in words is "three hundred twenty-one million, four hundred four thousand, nine hundred forty-two".