1021420450 has 24 divisors (see below), whose sum is σ = 1940268672. Its totient is φ = 399874320.

The previous prime is 1021420423. The next prime is 1021420451. The reversal of 1021420450 is 540241201.

1021420450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1021420451) 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, 214974 + ... + 219673.

It is an arithmetic number, because the mean of its divisors is an integer number (80844528).

Almost surely, 2^1021420450 is an apocalyptic number.

1021420450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021420450 is a deficient number, since it is larger than the sum of its proper divisors (918848222).

1021420450 is a wasteful number, since it uses less digits than its factorization.

1021420450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434706 (or 434701 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 1021420450 is about 31959.6691159342. The cubic root of 1021420450 is about 1007.0897664235.

Adding to 1021420450 its reverse (540241201), we get a palindrome (1561661651).

The spelling of 1021420450 in words is "one billion, twenty-one million, four hundred twenty thousand, four hundred fifty".