151242421 has 16 divisors (see below), whose sum is σ = 179426880. Its totient is φ = 125902080.

The previous prime is 151242407. The next prime is 151242433. The reversal of 151242421 is 124242151.

It is a cyclic number.

It is not a de Polignac number, because 151242421 - 2⁵ = 151242389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 151242392 and 151242401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151242401) 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 15 ways as a sum of consecutive naturals, for example, 4011 + ... + 17848.

It is an arithmetic number, because the mean of its divisors is an integer number (11214180).

Almost surely, 2^151242421 is an apocalyptic number.

151242421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

151242421 is a deficient number, since it is larger than the sum of its proper divisors (28184459).

151242421 is a wasteful number, since it uses less digits than its factorization.

151242421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21924.

The product of its digits is 640, while the sum is 22.

The square root of 151242421 is about 12298.0657422214. The cubic root of 151242421 is about 532.7922188414.

Adding to 151242421 its reverse (124242151), we get a palindrome (275484572).

The spelling of 151242421 in words is "one hundred fifty-one million, two hundred forty-two thousand, four hundred twenty-one".