1421550 has 96 divisors (see below), whose sum is σ = 4270560. Its totient is φ = 349920.

The previous prime is 1421549. The next prime is 1421569. The reversal of 1421550 is 551241.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 109344 + ... + 109356.

It is an arithmetic number, because the mean of its divisors is an integer number (44485).

2^1421550 is an apocalyptic number.

1421550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1421550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2135280).

1421550 is an abundant number, since it is smaller than the sum of its proper divisors (2849010).

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

1421550 is an equidigital number, since it uses as much as digits as its factorization.

1421550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46 (or 23 counting only the distinct ones).

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

The square root of 1421550 is about 1192.2877169543. The cubic root of 1421550 is about 112.4399679715.

Adding to 1421550 its reverse (551241), we get a palindrome (1972791).

The spelling of 1421550 in words is "one million, four hundred twenty-one thousand, five hundred fifty".