151012421 has 4 divisors (see below), whose sum is σ = 172585632. Its totient is φ = 129439212.

The previous prime is 151012397. The next prime is 151012469. The reversal of 151012421 is 124210151.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-151012421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 151012421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151012481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10786595 + ... + 10786608.

It is an arithmetic number, because the mean of its divisors is an integer number (43146408).

Almost surely, 2^151012421 is an apocalyptic number.

It is an amenable number.

151012421 is a deficient number, since it is larger than the sum of its proper divisors (21573211).

151012421 is an equidigital number, since it uses as much as digits as its factorization.

151012421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21573210.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 151012421 is about 12288.7111203739. The cubic root of 151012421 is about 532.5220028085.

Adding to 151012421 its reverse (124210151), we get a palindrome (275222572).

It can be divided in two parts, 1510 and 12421, that added together give a palindrome (13931).

The spelling of 151012421 in words is "one hundred fifty-one million, twelve thousand, four hundred twenty-one".