1309121 has 8 divisors (see below), whose sum is σ = 1452288. Its totient is φ = 1170000.

The previous prime is 1309117. The next prime is 1309123. The reversal of 1309121 is 1219031.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1309121 - 2² = 1309117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1309121.

It is not an unprimeable number, because it can be changed into a prime (1309123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 305 + ... + 1646.

It is an arithmetic number, because the mean of its divisors is an integer number (181536).

2^1309121 is an apocalyptic number.

1309121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1309121 is a deficient number, since it is larger than the sum of its proper divisors (143167).

1309121 is a wasteful number, since it uses less digits than its factorization.

1309121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2023.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 1309121 is about 1144.1682568574. The cubic root of 1309121 is about 109.3939396861.

It can be divided in two parts, 13091 and 21, that multiplied together give a triangular number (274911 = T₇₄₁).

The spelling of 1309121 in words is "one million, three hundred nine thousand, one hundred twenty-one".