1506857481 has 24 divisors (see below), whose sum is σ = 2202220800. Its totient is φ = 992772000.

The previous prime is 1506857479. The next prime is 1506857483. The reversal of 1506857481 is 1847586051.

1506857481 is a `hidden beast` number, since 15 + 0 + 68 + 574 + 8 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (1506857479) and next prime (1506857483).

It is not a de Polignac number, because 1506857481 - 2¹ = 1506857479 is a prime.

It is a super-2 number, since 2×1506857481² = 4541238936091330722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1506857483) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 626920 + ... + 629318.

It is an arithmetic number, because the mean of its divisors is an integer number (91759200).

Almost surely, 2^1506857481 is an apocalyptic number.

It is an amenable number.

1506857481 is a deficient number, since it is larger than the sum of its proper divisors (695363319).

1506857481 is a wasteful number, since it uses less digits than its factorization.

1506857481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3197 (or 3194 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 45.

The square root of 1506857481 is about 38818.2622099444. The cubic root of 1506857481 is about 1146.4560034829.

The spelling of 1506857481 in words is "one billion, five hundred six million, eight hundred fifty-seven thousand, four hundred eighty-one".