42501001 has 2 divisors, whose sum is σ = 42501002. Its totient is φ = 42501000.

The previous prime is 42500989. The next prime is 42501007. The reversal of 42501001 is 10010524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42250000 + 251001 = 6500^2 + 501^2 .

It is a cyclic number.

It is not a de Polignac number, because 42501001 - 2⁷ = 42500873 is a prime.

It is not a weakly prime, because it can be changed into another prime (42501007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21250500 + 21250501.

It is an arithmetic number, because the mean of its divisors is an integer number (21250501).

Almost surely, 2^42501001 is an apocalyptic number.

It is an amenable number.

42501001 is a deficient number, since it is larger than the sum of its proper divisors (1).

42501001 is an equidigital number, since it uses as much as digits as its factorization.

42501001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 42501001 is about 6519.2791779460. The cubic root of 42501001 is about 348.9793421324.

Adding to 42501001 its reverse (10010524), we get a palindrome (52511525).

The spelling of 42501001 in words is "forty-two million, five hundred one thousand, one".