46142821 has 2 divisors, whose sum is σ = 46142822. Its totient is φ = 46142820.

The previous prime is 46142819. The next prime is 46142839. The reversal of 46142821 is 12824164.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46049796 + 93025 = 6786^2 + 305^2 .

It is a cyclic number.

It is not a de Polignac number, because 46142821 - 2¹ = 46142819 is a prime.

Together with 46142819, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 46142821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (46142801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23071410 + 23071411.

It is an arithmetic number, because the mean of its divisors is an integer number (23071411).

Almost surely, 2^46142821 is an apocalyptic number.

It is an amenable number.

46142821 is a deficient number, since it is larger than the sum of its proper divisors (1).

46142821 is an equidigital number, since it uses as much as digits as its factorization.

46142821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3072, while the sum is 28.

The square root of 46142821 is about 6792.8507270512. The cubic root of 46142821 is about 358.6752260725.

Adding to 46142821 its reverse (12824164), we get a palindrome (58966985).

The spelling of 46142821 in words is "forty-six million, one hundred forty-two thousand, eight hundred twenty-one".