415378421 has 4 divisors (see below), whose sum is σ = 425509644. Its totient is φ = 405247200.

The previous prime is 415378351. The next prime is 415378427. The reversal of 415378421 is 124873514.

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

It can be written as a sum of positive squares in 2 ways, for example, as 104244100 + 311134321 = 10210^2 + 17639^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-415378421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (415378427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5065550 + ... + 5065631.

It is an arithmetic number, because the mean of its divisors is an integer number (106377411).

Almost surely, 2^415378421 is an apocalyptic number.

415378421 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

415378421 is a deficient number, since it is larger than the sum of its proper divisors (10131223).

415378421 is a wasteful number, since it uses less digits than its factorization.

415378421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10131222.

The product of its digits is 26880, while the sum is 35.

The square root of 415378421 is about 20380.8346492483. The cubic root of 415378421 is about 746.1302430562.

The spelling of 415378421 in words is "four hundred fifteen million, three hundred seventy-eight thousand, four hundred twenty-one".