154021240 has 32 divisors (see below), whose sum is σ = 351301680. Its totient is φ = 60763392.

The previous prime is 154021229. The next prime is 154021243. The reversal of 154021240 is 42120451.

154021240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×154021240² = 47445084742275200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154021243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23454 + ... + 29293.

Almost surely, 2^154021240 is an apocalyptic number.

154021240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

154021240 is an abundant number, since it is smaller than the sum of its proper divisors (197280440).

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

154021240 is a wasteful number, since it uses less digits than its factorization.

154021240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52831 (or 52827 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 154021240 is about 12410.5294004728. The cubic root of 154021240 is about 536.0354825400.

Adding to 154021240 its reverse (42120451), we get a palindrome (196141691).

The spelling of 154021240 in words is "one hundred fifty-four million, twenty-one thousand, two hundred forty".