150520421 has 2 divisors, whose sum is σ = 150520422. Its totient is φ = 150520420.

The previous prime is 150520361. The next prime is 150520439. The reversal of 150520421 is 124025051.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113188321 + 37332100 = 10639^2 + 6110^2 .

It is an emirp because it is prime and its reverse (124025051) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-150520421 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 150520393 and 150520402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (150525421) 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 as a sum of consecutive naturals, namely, 75260210 + 75260211.

It is an arithmetic number, because the mean of its divisors is an integer number (75260211).

Almost surely, 2^150520421 is an apocalyptic number.

It is an amenable number.

150520421 is a deficient number, since it is larger than the sum of its proper divisors (1).

150520421 is an equidigital number, since it uses as much as digits as its factorization.

150520421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 150520421 is about 12268.6764159790. The cubic root of 150520421 is about 531.9430529147.

Adding to 150520421 its reverse (124025051), we get a palindrome (274545472).

The spelling of 150520421 in words is "one hundred fifty million, five hundred twenty thousand, four hundred twenty-one".