154642013 has 4 divisors (see below), whose sum is σ = 163738620. Its totient is φ = 145545408.

The previous prime is 154642001. The next prime is 154642027. The reversal of 154642013 is 310246451.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 138344644 + 16297369 = 11762^2 + 4037^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154642013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154642063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4548278 + ... + 4548311.

It is an arithmetic number, because the mean of its divisors is an integer number (40934655).

Almost surely, 2^154642013 is an apocalyptic number.

It is an amenable number.

154642013 is a deficient number, since it is larger than the sum of its proper divisors (9096607).

154642013 is an equidigital number, since it uses as much as digits as its factorization.

154642013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9096606.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 154642013 is about 12435.5141831771. The cubic root of 154642013 is about 536.7546697155.

Adding to 154642013 its reverse (310246451), we get a palindrome (464888464).

The spelling of 154642013 in words is "one hundred fifty-four million, six hundred forty-two thousand, thirteen".