1450021381 has 2 divisors, whose sum is σ = 1450021382. Its totient is φ = 1450021380.

The previous prime is 1450021367. The next prime is 1450021403. The reversal of 1450021381 is 1831200541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1178892225 + 271129156 = 34335^2 + 16466^2 .

It is a cyclic number.

It is not a de Polignac number, because 1450021381 - 2²⁵ = 1416466949 is a prime.

It is a super-2 number, since 2×1450021381² = 4205124010714294322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1450021981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 725010690 + 725010691.

It is an arithmetic number, because the mean of its divisors is an integer number (725010691).

Almost surely, 2^1450021381 is an apocalyptic number.

It is an amenable number.

1450021381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1450021381 is an equidigital number, since it uses as much as digits as its factorization.

1450021381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 1450021381 is about 38079.1462745687. The cubic root of 1450021381 is about 1131.8567591794.

The spelling of 1450021381 in words is "one billion, four hundred fifty million, twenty-one thousand, three hundred eighty-one".