151542121 has 8 divisors (see below), whose sum is σ = 155791944. Its totient is φ = 147300480.

The previous prime is 151542113. The next prime is 151542137. The reversal of 151542121 is 121245151.

It can be written as a sum of positive squares in 4 ways, for example, as 121992025 + 29550096 = 11045^2 + 5436^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 151542121 - 2³ = 151542113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 151542092 and 151542101.

It is not an unprimeable number, because it can be changed into a prime (151542151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69711 + ... + 71851.

It is an arithmetic number, because the mean of its divisors is an integer number (19473993).

Almost surely, 2^151542121 is an apocalyptic number.

It is an amenable number.

151542121 is a deficient number, since it is larger than the sum of its proper divisors (4249823).

151542121 is a wasteful number, since it uses less digits than its factorization.

151542121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4091.

The product of its digits is 400, while the sum is 22.

The square root of 151542121 is about 12310.2445548413. The cubic root of 151542121 is about 533.1439113341.

Adding to 151542121 its reverse (121245151), we get a palindrome (272787272).

The spelling of 151542121 in words is "one hundred fifty-one million, five hundred forty-two thousand, one hundred twenty-one".