154642513 has 2 divisors, whose sum is σ = 154642514. Its totient is φ = 154642512.

The previous prime is 154642511. The next prime is 154642559. The reversal of 154642513 is 315246451.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137898049 + 16744464 = 11743^2 + 4092^2 .

It is a cyclic number.

It is not a de Polignac number, because 154642513 - 2¹ = 154642511 is a prime.

Together with 154642511, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (154642511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77321256 + 77321257.

It is an arithmetic number, because the mean of its divisors is an integer number (77321257).

Almost surely, 2^154642513 is an apocalyptic number.

It is an amenable number.

154642513 is a deficient number, since it is larger than the sum of its proper divisors (1).

154642513 is an equidigital number, since it uses as much as digits as its factorization.

154642513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 31.

The square root of 154642513 is about 12435.5342868732. The cubic root of 154642513 is about 536.7552482065.

Adding to 154642513 its reverse (315246451), we get a palindrome (469888964).

The spelling of 154642513 in words is "one hundred fifty-four million, six hundred forty-two thousand, five hundred thirteen".