150321421 has 4 divisors (see below), whose sum is σ = 153817312. Its totient is φ = 146825532.

The previous prime is 150321403. The next prime is 150321427. The reversal of 150321421 is 124123051.

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: 124123051 = 13 ⋅9547927.

It is a cyclic number.

It is not a de Polignac number, because 150321421 - 2⁵ = 150321389 is a prime.

It is a super-2 number, since 2×150321421² = 45193059222918482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (150321427) 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, 1747881 + ... + 1747966.

It is an arithmetic number, because the mean of its divisors is an integer number (38454328).

Almost surely, 2^150321421 is an apocalyptic number.

It is an amenable number.

150321421 is a deficient number, since it is larger than the sum of its proper divisors (3495891).

150321421 is an equidigital number, since it uses as much as digits as its factorization.

150321421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3495890.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 150321421 is about 12260.5636493597. The cubic root of 150321421 is about 531.7085258177.

Adding to 150321421 its reverse (124123051), we get a palindrome (274444472).

The spelling of 150321421 in words is "one hundred fifty million, three hundred twenty-one thousand, four hundred twenty-one".