1204381 has 4 divisors (see below), whose sum is σ = 1243264. Its totient is φ = 1165500.

The previous prime is 1204369. The next prime is 1204397. The reversal of 1204381 is 1834021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1204381 is a prime.

It is a super-2 number, since 2×1204381² = 2901067186322, which contains 22 as substring.

It is a Duffinian number.

1204381 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1204681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19395 + ... + 19456.

It is an arithmetic number, because the mean of its divisors is an integer number (310816).

2^1204381 is an apocalyptic number.

It is an amenable number.

1204381 is a deficient number, since it is larger than the sum of its proper divisors (38883).

1204381 is an equidigital number, since it uses as much as digits as its factorization.

1204381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38882.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1204381 is about 1097.4429370131. The cubic root of 1204381 is about 106.3950195061.

The spelling of 1204381 in words is "one million, two hundred four thousand, three hundred eighty-one".