1642204601 has 2 divisors, whose sum is σ = 1642204602. Its totient is φ = 1642204600.

The previous prime is 1642204591. The next prime is 1642204609. The reversal of 1642204601 is 1064022461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1247149225 + 395055376 = 35315^2 + 19876^2 .

It is a cyclic number.

It is not a de Polignac number, because 1642204601 - 2⁶ = 1642204537 is a prime.

It is not a weakly prime, because it can be changed into another prime (1642204609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821102300 + 821102301.

It is an arithmetic number, because the mean of its divisors is an integer number (821102301).

Almost surely, 2^1642204601 is an apocalyptic number.

It is an amenable number.

1642204601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642204601 is an equidigital number, since it uses as much as digits as its factorization.

1642204601 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1642204601 is about 40524.1236919443. The cubic root of 1642204601 is about 1179.8018917154.

The spelling of 1642204601 in words is "one billion, six hundred forty-two million, two hundred four thousand, six hundred one".