150729121 has 2 divisors, whose sum is σ = 150729122. Its totient is φ = 150729120.

The previous prime is 150729119. The next prime is 150729149. The reversal of 150729121 is 121927051.

It is an a-pointer prime, because the next prime (150729149) can be obtained adding 150729121 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109307025 + 41422096 = 10455^2 + 6436^2 .

It is an emirp because it is prime and its reverse (121927051) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 150729121 - 2¹ = 150729119 is a prime.

Together with 150729119, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 150729121.

It is not a weakly prime, because it can be changed into another prime (150729151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75364560 + 75364561.

It is an arithmetic number, because the mean of its divisors is an integer number (75364561).

Almost surely, 2^150729121 is an apocalyptic number.

It is an amenable number.

150729121 is a deficient number, since it is larger than the sum of its proper divisors (1).

150729121 is an equidigital number, since it uses as much as digits as its factorization.

150729121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 28.

The square root of 150729121 is about 12277.1788697567. The cubic root of 150729121 is about 532.1887897720.

It can be divided in two parts, 1507 and 29121, that added together give a triangular number (30628 = T₂₄₇).

The spelling of 150729121 in words is "one hundred fifty million, seven hundred twenty-nine thousand, one hundred twenty-one".