1423987 has 4 divisors (see below), whose sum is σ = 1473120. Its totient is φ = 1374856.

The previous prime is 1423979. The next prime is 1423991. The reversal of 1423987 is 7893241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7893241 = 257 ⋅30713.

It is a cyclic number.

It is not a de Polignac number, because 1423987 - 2³ = 1423979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1423957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24523 + ... + 24580.

It is an arithmetic number, because the mean of its divisors is an integer number (368280).

2^1423987 is an apocalyptic number.

1423987 is a deficient number, since it is larger than the sum of its proper divisors (49133).

1423987 is an equidigital number, since it uses as much as digits as its factorization.

1423987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49132.

The product of its digits is 12096, while the sum is 34.

The square root of 1423987 is about 1193.3092641893. The cubic root of 1423987 is about 112.5041842065.

The spelling of 1423987 in words is "one million, four hundred twenty-three thousand, nine hundred eighty-seven".