421042040 has 32 divisors (see below), whose sum is σ = 953171280. Its totient is φ = 167380992.

The previous prime is 421041977. The next prime is 421042049. The reversal of 421042040 is 40240124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421042049) 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, 25769 + ... + 38808.

Almost surely, 2^421042040 is an apocalyptic number.

421042040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421042040 is an abundant number, since it is smaller than the sum of its proper divisors (532129240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421042040 is a wasteful number, since it uses less digits than its factorization.

421042040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64751 (or 64747 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 421042040 is about 20519.3089552256. The cubic root of 421042040 is about 749.5060688548.

Adding to 421042040 its reverse (40240124), we get a palindrome (461282164).

It can be divided in two parts, 42104 and 2040, that added together give a palindrome (44144).

The spelling of 421042040 in words is "four hundred twenty-one million, forty-two thousand, forty".