1187013 has 4 divisors (see below), whose sum is σ = 1582688. Its totient is φ = 791340.

The previous prime is 1187009. The next prime is 1187023. The reversal of 1187013 is 3107811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1187013 - 2² = 1187009 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1187003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197833 + ... + 197838.

It is an arithmetic number, because the mean of its divisors is an integer number (395672).

2^1187013 is an apocalyptic number.

It is an amenable number.

1187013 is a deficient number, since it is larger than the sum of its proper divisors (395675).

1187013 is an equidigital number, since it uses as much as digits as its factorization.

1187013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395674.

The product of its (nonzero) digits is 168, while the sum is 21.

The square root of 1187013 is about 1089.5012620461. The cubic root of 1187013 is about 105.8811115141.

The spelling of 1187013 in words is "one million, one hundred eighty-seven thousand, thirteen".