1020427515 has 12 divisors (see below), whose sum is σ = 1768741104. Its totient is φ = 544227984.

The previous prime is 1020427493. The next prime is 1020427517. The reversal of 1020427515 is 5157240201.

1020427515 is a `hidden beast` number, since 102 + 0 + 42 + 7 + 515 = 666.

It is not a de Polignac number, because 1020427515 - 2⁶ = 1020427451 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1020427517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11338039 + ... + 11338128.

It is an arithmetic number, because the mean of its divisors is an integer number (147395092).

Almost surely, 2^1020427515 is an apocalyptic number.

1020427515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1020427515 is a deficient number, since it is larger than the sum of its proper divisors (748313589).

1020427515 is a wasteful number, since it uses less digits than its factorization.

1020427515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22676178 (or 22676175 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 1020427515 is about 31944.1311511207. The cubic root of 1020427515 is about 1006.7633259646.

Adding to 1020427515 its reverse (5157240201), we get a palindrome (6177667716).

The spelling of 1020427515 in words is "one billion, twenty million, four hundred twenty-seven thousand, five hundred fifteen".