150640421 has 4 divisors (see below), whose sum is σ = 152333100. Its totient is φ = 148947744.

The previous prime is 150640403. The next prime is 150640423. The reversal of 150640421 is 124046051.

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 11730625 + 138909796 = 3425^2 + 11786^2 .

It is a cyclic number.

It is not a de Polignac number, because 150640421 - 2²² = 146446117 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 (150640423) 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, 846206 + ... + 846383.

It is an arithmetic number, because the mean of its divisors is an integer number (38083275).

Almost surely, 2^150640421 is an apocalyptic number.

It is an amenable number.

150640421 is a deficient number, since it is larger than the sum of its proper divisors (1692679).

150640421 is an equidigital number, since it uses as much as digits as its factorization.

150640421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1692678.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 150640421 is about 12273.5659447448. The cubic root of 150640421 is about 532.0843763978.

Adding to 150640421 its reverse (124046051), we get a palindrome (274686472).

The spelling of 150640421 in words is "one hundred fifty million, six hundred forty thousand, four hundred twenty-one".