1187423 has 4 divisors (see below), whose sum is σ = 1189608. Its totient is φ = 1185240.

The previous prime is 1187419. The next prime is 1187429. The reversal of 1187423 is 3247811.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3247811 = 7 ⋅463973.

It is a cyclic number.

It is not a de Polignac number, because 1187423 - 2² = 1187419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1187392 and 1187401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1187429) 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, 440 + ... + 1602.

It is an arithmetic number, because the mean of its divisors is an integer number (297402).

2^1187423 is an apocalyptic number.

1187423 is a deficient number, since it is larger than the sum of its proper divisors (2185).

1187423 is a wasteful number, since it uses less digits than its factorization.

1187423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2184.

The product of its digits is 1344, while the sum is 26.

The square root of 1187423 is about 1089.6894052894. The cubic root of 1187423 is about 105.8933007259.

The spelling of 1187423 in words is "one million, one hundred eighty-seven thousand, four hundred twenty-three".