1421745 has 32 divisors (see below), whose sum is σ = 2564352. Its totient is φ = 667392.

The previous prime is 1421741. The next prime is 1421747. The reversal of 1421745 is 5471241.

It is not a de Polignac number, because 1421745 - 2² = 1421741 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1421741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4327 + ... + 4643.

It is an arithmetic number, because the mean of its divisors is an integer number (80136).

2^1421745 is an apocalyptic number.

1421745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1421745 is a deficient number, since it is larger than the sum of its proper divisors (1142607).

1421745 is a wasteful number, since it uses less digits than its factorization.

1421745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361.

The product of its digits is 1120, while the sum is 24.

The square root of 1421745 is about 1192.3694897137. The cubic root of 1421745 is about 112.4451090244.

Adding to 1421745 its reverse (5471241), we get a palindrome (6892986).

The spelling of 1421745 in words is "one million, four hundred twenty-one thousand, seven hundred forty-five".