100421449 has 2 divisors, whose sum is σ = 100421450. Its totient is φ = 100421448.

The previous prime is 100421443. The next prime is 100421471. The reversal of 100421449 is 944124001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77792400 + 22629049 = 8820^2 + 4757^2 .

It is a cyclic number.

It is not a de Polignac number, because 100421449 - 2⁵ = 100421417 is a prime.

It is not a weakly prime, because it can be changed into another prime (100421443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50210724 + 50210725.

It is an arithmetic number, because the mean of its divisors is an integer number (50210725).

Almost surely, 2^100421449 is an apocalyptic number.

It is an amenable number.

100421449 is a deficient number, since it is larger than the sum of its proper divisors (1).

100421449 is an equidigital number, since it uses as much as digits as its factorization.

100421449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 100421449 is about 10021.0502942556. The cubic root of 100421449 is about 464.8100337847.

The spelling of 100421449 in words is "one hundred million, four hundred twenty-one thousand, four hundred forty-nine".