151434721 has 8 divisors (see below), whose sum is σ = 156829184. Its totient is φ = 146072160.

The previous prime is 151434713. The next prime is 151434749. The reversal of 151434721 is 127434151.

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 151434721 - 2³ = 151434713 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 151434721.

It is not an unprimeable number, because it can be changed into a prime (151434421) 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 in 7 ways as a sum of consecutive naturals, for example, 1900 + ... + 17506.

It is an arithmetic number, because the mean of its divisors is an integer number (19603648).

Almost surely, 2^151434721 is an apocalyptic number.

It is an amenable number.

151434721 is a deficient number, since it is larger than the sum of its proper divisors (5394463).

151434721 is a wasteful number, since it uses less digits than its factorization.

151434721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15951.

The product of its digits is 3360, while the sum is 28.

The square root of 151434721 is about 12305.8815612698. The cubic root of 151434721 is about 533.0179327438.

Adding to 151434721 its reverse (127434151), we get a palindrome (278868872).

The spelling of 151434721 in words is "one hundred fifty-one million, four hundred thirty-four thousand, seven hundred twenty-one".