151234421 has 4 divisors (see below), whose sum is σ = 162867852. Its totient is φ = 139600992.

The previous prime is 151234409. The next prime is 151234423. The reversal of 151234421 is 124432151.

151234421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124432151 = 1087 ⋅114473.

It can be written as a sum of positive squares in 2 ways, for example, as 12348196 + 138886225 = 3514^2 + 11785^2 .

It is a cyclic number.

It is not a de Polignac number, because 151234421 - 2¹⁸ = 150972277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151234423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5816696 + ... + 5816721.

It is an arithmetic number, because the mean of its divisors is an integer number (40716963).

Almost surely, 2^151234421 is an apocalyptic number.

It is an amenable number.

151234421 is a deficient number, since it is larger than the sum of its proper divisors (11633431).

151234421 is a wasteful number, since it uses less digits than its factorization.

151234421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11633430.

The product of its digits is 960, while the sum is 23.

The square root of 151234421 is about 12297.7404835197. The cubic root of 151234421 is about 532.7828246232.

Adding to 151234421 its reverse (124432151), we get a palindrome (275666572).

The spelling of 151234421 in words is "one hundred fifty-one million, two hundred thirty-four thousand, four hundred twenty-one".