42402001 has 2 divisors, whose sum is σ = 42402002. Its totient is φ = 42402000.

The previous prime is 42401993. The next prime is 42402023. The reversal of 42402001 is 10020424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41267776 + 1134225 = 6424^2 + 1065^2 .

It is a cyclic number.

It is not a de Polignac number, because 42402001 - 2³ = 42401993 is a prime.

It is not a weakly prime, because it can be changed into another prime (42402071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21201000 + 21201001.

It is an arithmetic number, because the mean of its divisors is an integer number (21201001).

Almost surely, 2^42402001 is an apocalyptic number.

It is an amenable number.

42402001 is a deficient number, since it is larger than the sum of its proper divisors (1).

42402001 is an equidigital number, since it uses as much as digits as its factorization.

42402001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 42402001 is about 6511.6818871932. The cubic root of 42402001 is about 348.7081656547.

Adding to 42402001 its reverse (10020424), we get a palindrome (52422425).

It can be divided in two parts, 4240 and 2001, that added together give a square (6241 = 79²).

The spelling of 42402001 in words is "forty-two million, four hundred two thousand, one".