1390111 has 2 divisors, whose sum is σ = 1390112. Its totient is φ = 1390110.

The previous prime is 1390087. The next prime is 1390117. The reversal of 1390111 is 1110931.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1110931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1390111 - 2¹¹ = 1388063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1390117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695055 + 695056.

It is an arithmetic number, because the mean of its divisors is an integer number (695056).

2^1390111 is an apocalyptic number.

1390111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1390111 is an equidigital number, since it uses as much as digits as its factorization.

1390111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27, while the sum is 16.

The square root of 1390111 is about 1179.0296858010. The cubic root of 1390111 is about 111.6048736112.

It can be divided in two parts, 1390 and 111, that multiplied together give a triangular number (154290 = T₅₅₅).

The spelling of 1390111 in words is "one million, three hundred ninety thousand, one hundred eleven".