42121463 has 2 divisors, whose sum is σ = 42121464. Its totient is φ = 42121462.

The previous prime is 42121459. The next prime is 42121477. The reversal of 42121463 is 36412124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42121463 - 2² = 42121459 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42121483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21060731 + 21060732.

It is an arithmetic number, because the mean of its divisors is an integer number (21060732).

Almost surely, 2^42121463 is an apocalyptic number.

42121463 is a deficient number, since it is larger than the sum of its proper divisors (1).

42121463 is an equidigital number, since it uses as much as digits as its factorization.

42121463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 23.

The square root of 42121463 is about 6490.1050068547. The cubic root of 42121463 is about 347.9374281960.

Adding to 42121463 its reverse (36412124), we get a palindrome (78533587).

The spelling of 42121463 in words is "forty-two million, one hundred twenty-one thousand, four hundred sixty-three".