1121599 has 2 divisors, whose sum is σ = 1121600. Its totient is φ = 1121598.

The previous prime is 1121557. The next prime is 1121621. The reversal of 1121599 is 9951211.

It is a strong prime.

It is an emirp because it is prime and its reverse (9951211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1121599 - 2¹⁵ = 1088831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560799 + 560800.

It is an arithmetic number, because the mean of its divisors is an integer number (560800).

2^1121599 is an apocalyptic number.

1121599 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121599 is an equidigital number, since it uses as much as digits as its factorization.

1121599 is an evil number, because the sum of its binary digits is even.

The product of its digits is 810, while the sum is 28.

The square root of 1121599 is about 1059.0557114713. The cubic root of 1121599 is about 103.8992799534.

It can be divided in two parts, 112 and 1599, that added together give a triangular number (1711 = T₅₈).

The spelling of 1121599 in words is "one million, one hundred twenty-one thousand, five hundred ninety-nine".