1542132881 has 2 divisors, whose sum is σ = 1542132882. Its totient is φ = 1542132880.

The previous prime is 1542132871. The next prime is 1542132901. The reversal of 1542132881 is 1882312451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1413083281 + 129049600 = 37591^2 + 11360^2 .

It is a cyclic number.

It is not a de Polignac number, because 1542132881 - 2¹⁴ = 1542116497 is a prime.

It is a super-2 number, since 2×1542132881² = 4756347645322720322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1542132821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 771066440 + 771066441.

It is an arithmetic number, because the mean of its divisors is an integer number (771066441).

Almost surely, 2^1542132881 is an apocalyptic number.

It is an amenable number.

1542132881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1542132881 is an equidigital number, since it uses as much as digits as its factorization.

1542132881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15360, while the sum is 35.

The square root of 1542132881 is about 39269.9997580851. Note that the first 3 decimals coincide. The cubic root of 1542132881 is about 1155.3332324347. Note that the first 3 decimals are identical.

The spelling of 1542132881 in words is "one billion, five hundred forty-two million, one hundred thirty-two thousand, eight hundred eighty-one".