420615477 has 8 divisors (see below), whose sum is σ = 623134080. Its totient is φ = 280410300.

The previous prime is 420615457. The next prime is 420615497. The reversal of 420615477 is 774516024.

It is an interprime number because it is at equal distance from previous prime (420615457) and next prime (420615497).

It is not a de Polignac number, because 420615477 - 2¹¹ = 420613429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420615427) 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, 7789149 + ... + 7789202.

It is an arithmetic number, because the mean of its divisors is an integer number (77891760).

Almost surely, 2^420615477 is an apocalyptic number.

It is an amenable number.

420615477 is a deficient number, since it is larger than the sum of its proper divisors (202518603).

420615477 is a wasteful number, since it uses less digits than its factorization.

420615477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15578360 (or 15578354 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 420615477 is about 20508.9121359471. The cubic root of 420615477 is about 749.2528719801.

It can be divided in two parts, 4206 and 15477, that added together give a 9-th power (19683 = 3⁹).

The spelling of 420615477 in words is "four hundred twenty million, six hundred fifteen thousand, four hundred seventy-seven".