1346991 has 4 divisors (see below), whose sum is σ = 1795992. Its totient is φ = 897992.

The previous prime is 1346987. The next prime is 1346993. The reversal of 1346991 is 1996431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1346991 - 2² = 1346987 is a prime.

It is an Ulam number.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1346993) 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, 224496 + ... + 224501.

It is an arithmetic number, because the mean of its divisors is an integer number (448998).

2^1346991 is an apocalyptic number.

1346991 is a deficient number, since it is larger than the sum of its proper divisors (449001).

1346991 is an equidigital number, since it uses as much as digits as its factorization.

1346991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449000.

The product of its digits is 5832, while the sum is 33.

The square root of 1346991 is about 1160.5994140960. The cubic root of 1346991 is about 110.4387709079.

The spelling of 1346991 in words is "one million, three hundred forty-six thousand, nine hundred ninety-one".