421236040 has 32 divisors (see below), whose sum is σ = 951869880. Its totient is φ = 167767552.

The previous prime is 421236001. The next prime is 421236077. The reversal of 421236040 is 40632124.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 371024644 + 50211396 = 19262^2 + 7086^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13279 + ... + 31918.

Almost surely, 2^421236040 is an apocalyptic number.

421236040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421236040 is an abundant number, since it is smaller than the sum of its proper divisors (530633840).

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

421236040 is a wasteful number, since it uses less digits than its factorization.

421236040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45441 (or 45437 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 421236040 is about 20524.0356655313. The cubic root of 421236040 is about 749.6211657154.

Adding to 421236040 its reverse (40632124), we get a palindrome (461868164).

The spelling of 421236040 in words is "four hundred twenty-one million, two hundred thirty-six thousand, forty".