421155146 has 4 divisors (see below), whose sum is σ = 631732722. Its totient is φ = 210577572.

The previous prime is 421155131. The next prime is 421155149. The reversal of 421155146 is 641551124.

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

It can be written as a sum of positive squares in only one way, i.e., 413674921 + 7480225 = 20339^2 + 2735^2 .

It is not an unprimeable number, because it can be changed into a prime (421155149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105288785 + ... + 105288788.

Almost surely, 2^421155146 is an apocalyptic number.

421155146 is a deficient number, since it is larger than the sum of its proper divisors (210577576).

421155146 is a wasteful number, since it uses less digits than its factorization.

421155146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210577575.

The product of its digits is 4800, while the sum is 29.

The square root of 421155146 is about 20522.0648571239. The cubic root of 421155146 is about 749.5731769941.

The spelling of 421155146 in words is "four hundred twenty-one million, one hundred fifty-five thousand, one hundred forty-six".