1420405450 has 24 divisors (see below), whose sum is σ = 2643264972. Its totient is φ = 567880320.

The previous prime is 1420405447. The next prime is 1420405453. The reversal of 1420405450 is 545040241.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1420405447) and next prime (1420405453).

It can be written as a sum of positive squares in 6 ways, for example, as 1050343281 + 370062169 = 32409^2 + 19237^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (1420405453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116022 + ... + 127678.

Almost surely, 2^1420405450 is an apocalyptic number.

1420405450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1420405450 is a deficient number, since it is larger than the sum of its proper divisors (1222859522).

1420405450 is a wasteful number, since it uses less digits than its factorization.

1420405450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14106 (or 14101 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 1420405450 is about 37688.2667417858. The cubic root of 1420405450 is about 1124.0978314520.

Adding to 1420405450 its reverse (545040241), we get a palindrome (1965445691).

The spelling of 1420405450 in words is "one billion, four hundred twenty million, four hundred five thousand, four hundred fifty".