42001651 has 2 divisors, whose sum is σ = 42001652. Its totient is φ = 42001650.

The previous prime is 42001627. The next prime is 42001667. The reversal of 42001651 is 15610024.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42001651 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42001601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21000825 + 21000826.

It is an arithmetic number, because the mean of its divisors is an integer number (21000826).

Almost surely, 2^42001651 is an apocalyptic number.

42001651 is a deficient number, since it is larger than the sum of its proper divisors (1).

42001651 is an equidigital number, since it uses as much as digits as its factorization.

42001651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 42001651 is about 6480.8680745715. The cubic root of 42001651 is about 347.6072191274.

Adding to 42001651 its reverse (15610024), we get a palindrome (57611675).

The spelling of 42001651 in words is "forty-two million, one thousand, six hundred fifty-one".