421240523 has 8 divisors (see below), whose sum is σ = 471955440. Its totient is φ = 372595680.

The previous prime is 421240487. The next prime is 421240549. The reversal of 421240523 is 325042124.

It is a happy number.

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 421240523 - 2¹² = 421236427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421240553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 517088 + ... + 517901.

It is an arithmetic number, because the mean of its divisors is an integer number (58994430).

Almost surely, 2^421240523 is an apocalyptic number.

421240523 is a deficient number, since it is larger than the sum of its proper divisors (50714917).

421240523 is a wasteful number, since it uses less digits than its factorization.

421240523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035037.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 421240523 is about 20524.1448786545. The cubic root of 421240523 is about 749.6238249843.

Adding to 421240523 its reverse (325042124), we get a palindrome (746282647).

The spelling of 421240523 in words is "four hundred twenty-one million, two hundred forty thousand, five hundred twenty-three".