1099142 has 16 divisors (see below), whose sum is σ = 1838592. Its totient is φ = 488520.

The previous prime is 1099139. The next prime is 1099171. The reversal of 1099142 is 2419901.

It is a super-2 number, since 2×1099142² = 2416226272328, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 503 + ... + 1565.

It is an arithmetic number, because the mean of its divisors is an integer number (114912).

2^1099142 is an apocalyptic number.

1099142 is a deficient number, since it is larger than the sum of its proper divisors (739450).

1099142 is a wasteful number, since it uses less digits than its factorization.

1099142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 1099142 is about 1048.3997329263. The cubic root of 1099142 is about 103.2011652814.

The spelling of 1099142 in words is "one million, ninety-nine thousand, one hundred forty-two".