1421705450 has 48 divisors (see below), whose sum is σ = 2895350400. Its totient is φ = 515088000.

The previous prime is 1421705449. The next prime is 1421705459. The reversal of 1421705450 is 545071241.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1421705459) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149951 + ... + 159149.

It is an arithmetic number, because the mean of its divisors is an integer number (60319800).

Almost surely, 2^1421705450 is an apocalyptic number.

1421705450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1421705450 is an abundant number, since it is smaller than the sum of its proper divisors (1473644950).

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

1421705450 is a wasteful number, since it uses less digits than its factorization.

1421705450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9503 (or 9498 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 1421705450 is about 37705.5095443623. The cubic root of 1421705450 is about 1124.4406635145.

Adding to 1421705450 its reverse (545071241), we get a palindrome (1966776691).

The spelling of 1421705450 in words is "one billion, four hundred twenty-one million, seven hundred five thousand, four hundred fifty".