63420015 has 32 divisors (see below), whose sum is σ = 103910400. Its totient is φ = 33022080.

The previous prime is 63420011. The next prime is 63420023. The reversal of 63420015 is 51002436.

It is a happy number.

It is not a de Polignac number, because 63420015 - 2² = 63420011 is a prime.

It is a super-4 number, since 4×63420015⁴ (a number of 32 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 63419973 and 63420000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63420011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128920 + ... + 129410.

It is an arithmetic number, because the mean of its divisors is an integer number (3247200).

Almost surely, 2^63420015 is an apocalyptic number.

63420015 is a deficient number, since it is larger than the sum of its proper divisors (40490385).

63420015 is a wasteful number, since it uses less digits than its factorization.

63420015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 63420015 is about 7963.6684386029. The cubic root of 63420015 is about 398.7880294439.

The spelling of 63420015 in words is "sixty-three million, four hundred twenty thousand, fifteen".