1142420 has 18 divisors (see below), whose sum is σ = 2409162. Its totient is φ = 455056.

The previous prime is 1142389. The next prime is 1142423. The reversal of 1142420 is 242411.

It can be written as a sum of positive squares in only one way, i.e., 913936 + 228484 = 956^2 + 478^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1142395 and 1142404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4661 + ... + 4899.

2^1142420 is an apocalyptic number.

1142420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1142420 is an abundant number, since it is smaller than the sum of its proper divisors (1266742).

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

1142420 is an equidigital number, since it uses as much as digits as its factorization.

1142420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 1142420 is about 1068.8404932449. The cubic root of 1142420 is about 104.5382596870.

Adding to 1142420 its reverse (242411), we get a palindrome (1384831).

Subtracting from 1142420 its reverse (242411), we obtain a palindrome (900009).

The spelling of 1142420 in words is "one million, one hundred forty-two thousand, four hundred twenty".