1642725136 has 40 divisors (see below), whose sum is σ = 3576646080. Its totient is φ = 725214336.

The previous prime is 1642725109. The next prime is 1642725137. The reversal of 1642725136 is 6315272461.

It is a junction number, because it is equal to n+sod(n) for n = 1642725095 and 1642725104.

It is not an unprimeable number, because it can be changed into a prime (1642725137) 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, 166906 + ... + 176473.

It is an arithmetic number, because the mean of its divisors is an integer number (89416152).

Almost surely, 2^1642725136 is an apocalyptic number.

1642725136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1642725136 is an abundant number, since it is smaller than the sum of its proper divisors (1933920944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1642725136 is a wasteful number, since it uses less digits than its factorization.

1642725136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343423 (or 343417 counting only the distinct ones).

The product of its digits is 60480, while the sum is 37.

The square root of 1642725136 is about 40530.5457155464. The cubic root of 1642725136 is about 1179.9265337772.

Adding to 1642725136 its reverse (6315272461), we get a palindrome (7957997597).

The spelling of 1642725136 in words is "one billion, six hundred forty-two million, seven hundred twenty-five thousand, one hundred thirty-six".