1423540 has 24 divisors (see below), whose sum is σ = 3021480. Its totient is φ = 563328.

The previous prime is 1423511. The next prime is 1423547. The reversal of 1423540 is 453241.

It can be written as a sum of positive squares in 4 ways, for example, as 110224 + 1313316 = 332^2 + 1146^2 .

It is a super-2 number, since 2×1423540² = 4052932263200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1423547) 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 7 ways as a sum of consecutive naturals, for example, 1854 + ... + 2506.

It is an arithmetic number, because the mean of its divisors is an integer number (125895).

2^1423540 is an apocalyptic number.

1423540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1423540 is an abundant number, since it is smaller than the sum of its proper divisors (1597940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1423540 is a wasteful number, since it uses less digits than its factorization.

1423540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771 (or 769 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 1423540 is about 1193.1219552083. The cubic root of 1423540 is about 112.4924110107.

Adding to 1423540 its reverse (453241), we get a palindrome (1876781).

Subtracting from 1423540 its reverse (453241), we obtain a cube (970299 = 99³).

The spelling of 1423540 in words is "one million, four hundred twenty-three thousand, five hundred forty".