421402151 has 4 divisors (see below), whose sum is σ = 421560192. Its totient is φ = 421244112.

The previous prime is 421402147. The next prime is 421402153. The reversal of 421402151 is 151204124.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421402151 - 2² = 421402147 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 (421402153) 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, 74951 + ... + 80376.

It is an arithmetic number, because the mean of its divisors is an integer number (105390048).

Almost surely, 2^421402151 is an apocalyptic number.

421402151 is a deficient number, since it is larger than the sum of its proper divisors (158041).

421402151 is a wasteful number, since it uses less digits than its factorization.

421402151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158040.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 421402151 is about 20528.0820097738. The cubic root of 421402151 is about 749.7196884321.

Adding to 421402151 its reverse (151204124), we get a palindrome (572606275).

The spelling of 421402151 in words is "four hundred twenty-one million, four hundred two thousand, one hundred fifty-one".