1642947151 has 2 divisors, whose sum is σ = 1642947152. Its totient is φ = 1642947150.

The previous prime is 1642947127. The next prime is 1642947191. The reversal of 1642947151 is 1517492461.

It is a happy number.

It is an a-pointer prime, because the next prime (1642947191) can be obtained adding 1642947151 to its sum of digits (40).

It is a weak prime.

It is an emirp because it is prime and its reverse (1517492461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1642947151 - 2⁹ = 1642946639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1642947191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821473575 + 821473576.

It is an arithmetic number, because the mean of its divisors is an integer number (821473576).

Almost surely, 2^1642947151 is an apocalyptic number.

1642947151 is the 25636-th centered pentagonal number.

1642947151 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642947151 is an equidigital number, since it uses as much as digits as its factorization.

1642947151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 40.

The square root of 1642947151 is about 40533.2844832491. The cubic root of 1642947151 is about 1179.9796872401.

The spelling of 1642947151 in words is "one billion, six hundred forty-two million, nine hundred forty-seven thousand, one hundred fifty-one".