142557481 has 6 divisors (see below), whose sum is σ = 156695546. Its totient is φ = 129597600.

The previous prime is 142557449. The next prime is 142557487. The reversal of 142557481 is 184755241.

It can be written as a sum of positive squares in only one way, i.e., 117397225 + 25160256 = 10835^2 + 5016^2 .

It is not a de Polignac number, because 142557481 - 2⁵ = 142557449 is a prime.

It is a super-2 number, since 2×142557481² = 40645270778130722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142557481.

It is not an unprimeable number, because it can be changed into a prime (142557487) 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 5 ways as a sum of consecutive naturals, for example, 588960 + ... + 589201.

Almost surely, 2^142557481 is an apocalyptic number.

142557481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

142557481 is a deficient number, since it is larger than the sum of its proper divisors (14138065).

142557481 is a wasteful number, since it uses less digits than its factorization.

142557481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178183 (or 1178172 counting only the distinct ones).

The product of its digits is 44800, while the sum is 37.

The square root of 142557481 is about 11939.7437577194. The cubic root of 142557481 is about 522.3921845872.

It can be divided in two parts, 14255 and 7481, that added together give a triangular number (21736 = T₂₀₈).

The spelling of 142557481 in words is "one hundred forty-two million, five hundred fifty-seven thousand, four hundred eighty-one".