1442091 has 16 divisors (see below), whose sum is σ = 2249984. Its totient is φ = 804384.

The previous prime is 1442087. The next prime is 1442143. The reversal of 1442091 is 1902441.

It is not a de Polignac number, because 1442091 - 2² = 1442087 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

1442091 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1442071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105 + ... + 1701.

It is an arithmetic number, because the mean of its divisors is an integer number (140624).

2^1442091 is an apocalyptic number.

1442091 is a deficient number, since it is larger than the sum of its proper divisors (807893).

1442091 is a wasteful number, since it uses less digits than its factorization.

1442091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1650.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1442091 is about 1200.8709339475. The cubic root of 1442091 is about 112.9789555402.

The spelling of 1442091 in words is "one million, four hundred forty-two thousand, ninety-one".