1147421 has 4 divisors (see below), whose sum is σ = 1251744. Its totient is φ = 1043100.

The previous prime is 1147417. The next prime is 1147423. The reversal of 1147421 is 1247411.

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 not a de Polignac number, because 1147421 - 2² = 1147417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1147393 and 1147402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1147423) 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, 52145 + ... + 52166.

It is an arithmetic number, because the mean of its divisors is an integer number (312936).

2^1147421 is an apocalyptic number.

1147421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1147421 is a deficient number, since it is larger than the sum of its proper divisors (104323).

1147421 is a wasteful number, since it uses less digits than its factorization.

1147421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104322.

The product of its digits is 224, while the sum is 20.

The square root of 1147421 is about 1071.1773896045. The cubic root of 1147421 is about 104.6905781081.

The spelling of 1147421 in words is "one million, one hundred forty-seven thousand, four hundred twenty-one".