421042049 has 2 divisors, whose sum is σ = 421042050. Its totient is φ = 421042048.

The previous prime is 421041977. The next prime is 421042051. The reversal of 421042049 is 940240124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 345699649 + 75342400 = 18593^2 + 8680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421042049 is a prime.

It is a super-2 number, since 2×421042049² = 354552814052236802, which contains 22 as substring.

Together with 421042051, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (421042249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210521024 + 210521025.

It is an arithmetic number, because the mean of its divisors is an integer number (210521025).

Almost surely, 2^421042049 is an apocalyptic number.

It is an amenable number.

421042049 is a deficient number, since it is larger than the sum of its proper divisors (1).

421042049 is an equidigital number, since it uses as much as digits as its factorization.

421042049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 421042049 is about 20519.3091745312. The cubic root of 421042049 is about 749.5060741952.

The spelling of 421042049 in words is "four hundred twenty-one million, forty-two thousand, forty-nine".