1421145 has 60 divisors (see below), whose sum is σ = 2896740. Its totient is φ = 665280.

The previous prime is 1421141. The next prime is 1421153. The reversal of 1421145 is 5411241.

It can be written as a sum of positive squares in 2 ways, for example, as 627264 + 793881 = 792^2 + 891^2 .

It is not a de Polignac number, because 1421145 - 2² = 1421141 is a prime.

It is a super-2 number, since 2×1421145² = 4039306222050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 48991 + ... + 49019.

It is an arithmetic number, because the mean of its divisors is an integer number (48279).

2^1421145 is an apocalyptic number.

1421145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1421145 is an abundant number, since it is smaller than the sum of its proper divisors (1475595).

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

1421145 is a wasteful number, since it uses less digits than its factorization.

1421145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68 (or 48 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 1421145 is about 1192.1178633004. The cubic root of 1421145 is about 112.4292888977.

Adding to 1421145 its reverse (5411241), we get a palindrome (6832386).

The spelling of 1421145 in words is "one million, four hundred twenty-one thousand, one hundred forty-five".