1420545 has 32 divisors (see below), whose sum is σ = 2644992. Its totient is φ = 637632.

The previous prime is 1420519. The next prime is 1420561. The reversal of 1420545 is 5450241.

It is not a de Polignac number, because 1420545 - 2¹² = 1416449 is a prime.

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

1420545 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8634 + ... + 8796.

It is an arithmetic number, because the mean of its divisors is an integer number (82656).

2^1420545 is an apocalyptic number.

1420545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1420545 is a deficient number, since it is larger than the sum of its proper divisors (1224447).

1420545 is a wasteful number, since it uses less digits than its factorization.

1420545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 1420545 is about 1191.8661837639. The cubic root of 1420545 is about 112.4134643175.

Adding to 1420545 its reverse (5450241), we get a palindrome (6870786).

The spelling of 1420545 in words is "one million, four hundred twenty thousand, five hundred forty-five".