1423749 has 4 divisors (see below), whose sum is σ = 1898336. Its totient is φ = 949164.

The previous prime is 1423717. The next prime is 1423753. The reversal of 1423749 is 9473241.

It is a happy number.

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 1423749 - 2⁵ = 1423717 is a prime.

It is a super-3 number, since 3×1423749³ = 8658079133389376247, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1423759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237289 + ... + 237294.

It is an arithmetic number, because the mean of its divisors is an integer number (474584).

2^1423749 is an apocalyptic number.

It is an amenable number.

1423749 is a deficient number, since it is larger than the sum of its proper divisors (474587).

1423749 is an equidigital number, since it uses as much as digits as its factorization.

1423749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474586.

The product of its digits is 6048, while the sum is 30.

The square root of 1423749 is about 1193.2095373404. The cubic root of 1423749 is about 112.4979160108.

The spelling of 1423749 in words is "one million, four hundred twenty-three thousand, seven hundred forty-nine".