421523141 has 8 divisors (see below), whose sum is σ = 454237560. Its totient is φ = 388850112.

The previous prime is 421523131. The next prime is 421523147. The reversal of 421523141 is 141325124.

It can be written as a sum of positive squares in 4 ways, for example, as 863041 + 420660100 = 929^2 + 20510^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421523141 - 2⁶ = 421523077 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 (421523147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12731 + ... + 31703.

It is an arithmetic number, because the mean of its divisors is an integer number (56779695).

Almost surely, 2^421523141 is an apocalyptic number.

It is an amenable number.

421523141 is a deficient number, since it is larger than the sum of its proper divisors (32714419).

421523141 is a wasteful number, since it uses less digits than its factorization.

421523141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20695.

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

The square root of 421523141 is about 20531.0287370117. The cubic root of 421523141 is about 749.7914329681.

Adding to 421523141 its reverse (141325124), we get a palindrome (562848265).

The spelling of 421523141 in words is "four hundred twenty-one million, five hundred twenty-three thousand, one hundred forty-one".