1423634 has 4 divisors (see below), whose sum is σ = 2135454. Its totient is φ = 711816.

The previous prime is 1423627. The next prime is 1423637. The reversal of 1423634 is 4363241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4363241 = 67 ⋅65123.

It can be written as a sum of positive squares in only one way, i.e., 1216609 + 207025 = 1103^2 + 455^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1423637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 355907 + ... + 355910.

2^1423634 is an apocalyptic number.

1423634 is a deficient number, since it is larger than the sum of its proper divisors (711820).

1423634 is an equidigital number, since it uses as much as digits as its factorization.

1423634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711819.

The product of its digits is 1728, while the sum is 23.

The square root of 1423634 is about 1193.1613470105. The cubic root of 1423634 is about 112.4948870104.

Adding to 1423634 its reverse (4363241), we get a palindrome (5786875).

The spelling of 1423634 in words is "one million, four hundred twenty-three thousand, six hundred thirty-four".