150121640 has 32 divisors (see below), whose sum is σ = 341577000. Its totient is φ = 59372544.

The previous prime is 150121639. The next prime is 150121649. The reversal of 150121640 is 46121051.

It can be written as a sum of positive squares in 4 ways, for example, as 137405284 + 12716356 = 11722^2 + 3566^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (150121649) 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 in 7 ways as a sum of consecutive naturals, for example, 17525 + ... + 24644.

Almost surely, 2^150121640 is an apocalyptic number.

150121640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

150121640 is an abundant number, since it is smaller than the sum of its proper divisors (191455360).

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

150121640 is a wasteful number, since it uses less digits than its factorization.

150121640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42269 (or 42265 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 150121640 is about 12252.4136397691. The cubic root of 150121640 is about 531.4728699949.

Adding to 150121640 its reverse (46121051), we get a palindrome (196242691).

The spelling of 150121640 in words is "one hundred fifty million, one hundred twenty-one thousand, six hundred forty".