154256420 has 12 divisors (see below), whose sum is σ = 323938524. Its totient is φ = 61702560.

The previous prime is 154256393. The next prime is 154256449. The reversal of 154256420 is 24652451.

It can be written as a sum of positive squares in 2 ways, for example, as 22052416 + 132204004 = 4696^2 + 11498^2 .

It is a super-2 number, since 2×154256420² = 47590086222432800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3856391 + ... + 3856430.

It is an arithmetic number, because the mean of its divisors is an integer number (26994877).

Almost surely, 2^154256420 is an apocalyptic number.

154256420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

154256420 is an abundant number, since it is smaller than the sum of its proper divisors (169682104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

154256420 is a wasteful number, since it uses less digits than its factorization.

154256420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7712830 (or 7712828 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 154256420 is about 12420.0008051530. Note that the first 3 decimals coincide. The cubic root of 154256420 is about 536.3081737503.

The spelling of 154256420 in words is "one hundred fifty-four million, two hundred fifty-six thousand, four hundred twenty".