1042691 has 4 divisors (see below), whose sum is σ = 1122912. Its totient is φ = 962472.

The previous prime is 1042687. The next prime is 1042693. The reversal of 1042691 is 1962401.

1042691 = T₃₉₄ + T₃₉₅ + ... + T₄₀₆.

It is a happy number.

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 1042691 - 2² = 1042687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1042693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40091 + ... + 40116.

It is an arithmetic number, because the mean of its divisors is an integer number (280728).

2^1042691 is an apocalyptic number.

1042691 is a deficient number, since it is larger than the sum of its proper divisors (80221).

1042691 is an equidigital number, since it uses as much as digits as its factorization.

1042691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80220.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1042691 is about 1021.1224216518. The cubic root of 1042691 is about 101.4032501192.

The spelling of 1042691 in words is "one million, forty-two thousand, six hundred ninety-one".