1420155 has 48 divisors (see below), whose sum is σ = 2845440. Its totient is φ = 648000.

The previous prime is 1420151. The next prime is 1420169. The reversal of 1420155 is 5510241.

It is not a de Polignac number, because 1420155 - 2² = 1420151 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1420151) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9330 + ... + 9480.

It is an arithmetic number, because the mean of its divisors is an integer number (59280).

2^1420155 is an apocalyptic number.

1420155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1420155 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

1420155 is a wasteful number, since it uses less digits than its factorization.

1420155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 1420155 is about 1191.7025635619. The cubic root of 1420155 is about 112.4031759508.

Adding to 1420155 its reverse (5510241), we get a palindrome (6930396).

The spelling of 1420155 in words is "one million, four hundred twenty thousand, one hundred fifty-five".