151601121 has 24 divisors (see below), whose sum is σ = 264985344. Its totient is φ = 81532800.

The previous prime is 151601113. The next prime is 151601141. The reversal of 151601121 is 121106151.

It is a happy number.

151601121 is a `hidden beast` number, since 1 + 51 + 601 + 12 + 1 = 666.

151601121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 151601121 - 2³ = 151601113 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 151601094 and 151601103.

It is not an unprimeable number, because it can be changed into a prime (151601141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69705 + ... + 71846.

It is an arithmetic number, because the mean of its divisors is an integer number (11041056).

Almost surely, 2^151601121 is an apocalyptic number.

It is an amenable number.

151601121 is a deficient number, since it is larger than the sum of its proper divisors (113384223).

151601121 is a wasteful number, since it uses less digits than its factorization.

151601121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141581 (or 141578 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 18.

The square root of 151601121 is about 12312.6406997037. The cubic root of 151601121 is about 533.2130921208.

Adding to 151601121 its reverse (121106151), we get a palindrome (272707272).

The spelling of 151601121 in words is "one hundred fifty-one million, six hundred one thousand, one hundred twenty-one".