1420356 has 48 divisors (see below), whose sum is σ = 3898496. Its totient is φ = 393984.

The previous prime is 1420303. The next prime is 1420357. The reversal of 1420356 is 6530241.

It is a happy number.

It is a super-2 number, since 2×1420356² = 4034822333472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2880 + ... + 3336.

2^1420356 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1420356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1949248).

1420356 is an abundant number, since it is smaller than the sum of its proper divisors (2478140).

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

1420356 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 8 representation: 1420356 = (5326104)₈.

1420356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508 (or 506 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1420356 is about 1191.7868937021. The cubic root of 1420356 is about 112.4084786519.

Adding to 1420356 its reverse (6530241), we get a palindrome (7950597).

The spelling of 1420356 in words is "one million, four hundred twenty thousand, three hundred fifty-six".