154028681 has 4 divisors (see below), whose sum is σ = 154159632. Its totient is φ = 153897732.

The previous prime is 154028671. The next prime is 154028701. The reversal of 154028681 is 186820451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 186820451 = 173 ⋅1079887.

It is a cyclic number.

It is not a de Polignac number, because 154028681 - 2⁶ = 154028617 is a prime.

It is a super-2 number, since 2×154028681² = 47449669141199522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154028671) 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, 63695 + ... + 66068.

It is an arithmetic number, because the mean of its divisors is an integer number (38539908).

Almost surely, 2^154028681 is an apocalyptic number.

It is an amenable number.

154028681 is a deficient number, since it is larger than the sum of its proper divisors (130951).

154028681 is a wasteful number, since it uses less digits than its factorization.

154028681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130950.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 154028681 is about 12410.8291826131. The cubic root of 154028681 is about 536.0441146304.

The spelling of 154028681 in words is "one hundred fifty-four million, twenty-eight thousand, six hundred eighty-one".