1420455 has 16 divisors (see below), whose sum is σ = 2287584. Its totient is φ = 752640.

The previous prime is 1420429. The next prime is 1420483. The reversal of 1420455 is 5540241.

1420455 = 531² + 532² + ... + 535².

1420455 is a nontrivial binomial coefficient, being equal to C(1686, 2).

It is not a de Polignac number, because 1420455 - 2¹⁴ = 1404071 is a prime.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4047 + ... + 4383.

It is an arithmetic number, because the mean of its divisors is an integer number (142974).

2^1420455 is an apocalyptic number.

1420455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1420455 is the 1685-th triangular number and also the 843-rd hexagonal number.

1420455 is a deficient number, since it is larger than the sum of its proper divisors (867129).

1420455 is a wasteful number, since it uses less digits than its factorization.

1420455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626.

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

The square root of 1420455 is about 1191.8284272495. The cubic root of 1420455 is about 112.4110902462.

Adding to 1420455 its reverse (5540241), we get a palindrome (6960696).

The spelling of 1420455 in words is "one million, four hundred twenty thousand, four hundred fifty-five".