1542636481 has 8 divisors (see below), whose sum is σ = 1590567264. Its totient is φ = 1495253760.

The previous prime is 1542636451. The next prime is 1542636533. The reversal of 1542636481 is 1846362451.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1542636481 - 2¹¹ = 1542634433 is a prime.

It is a super-2 number, since 2×1542636481² = 4759454625024126722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1542636451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131296 + ... + 142561.

It is an arithmetic number, because the mean of its divisors is an integer number (198820908).

Almost surely, 2^1542636481 is an apocalyptic number.

It is an amenable number.

1542636481 is a deficient number, since it is larger than the sum of its proper divisors (47930783).

1542636481 is a wasteful number, since it uses less digits than its factorization.

1542636481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274031.

The product of its digits is 138240, while the sum is 40.

The square root of 1542636481 is about 39276.4112540848. The cubic root of 1542636481 is about 1155.4589808923.

The spelling of 1542636481 in words is "one billion, five hundred forty-two million, six hundred thirty-six thousand, four hundred eighty-one".