127785536 has 14 divisors (see below), whose sum is σ = 253574550. Its totient is φ = 63892736.

The previous prime is 127785533. The next prime is 127785547. The reversal of 127785536 is 635587721.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 79566400 + 48219136 = 8920^2 + 6944^2 .

It is not an unprimeable number, because it can be changed into a prime (127785533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 998261 + ... + 998388.

Almost surely, 2^127785536 is an apocalyptic number.

127785536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

127785536 is a deficient number, since it is larger than the sum of its proper divisors (125789014).

127785536 is an equidigital number, since it uses as much as digits as its factorization.

127785536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1996661 (or 1996651 counting only the distinct ones).

The product of its digits is 352800, while the sum is 44.

The square root of 127785536 is about 11304.2264662382. The cubic root of 127785536 is about 503.6867962499.

The spelling of 127785536 in words is "one hundred twenty-seven million, seven hundred eighty-five thousand, five hundred thirty-six".