139742650 has 24 divisors (see below), whose sum is σ = 260234460. Its totient is φ = 55829760.

The previous prime is 139742627. The next prime is 139742651. The reversal of 139742650 is 56247931.

It can be written as a sum of positive squares in 6 ways, for example, as 38800441 + 100942209 = 6229^2 + 10047^2 .

It is not an unprimeable number, because it can be changed into a prime (139742651) 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 11 ways as a sum of consecutive naturals, for example, 73512 + ... + 75388.

Almost surely, 2^139742650 is an apocalyptic number.

139742650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139742650 is a deficient number, since it is larger than the sum of its proper divisors (120491810).

139742650 is a wasteful number, since it uses less digits than its factorization.

139742650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3378 (or 3373 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 139742650 is about 11821.2795415725. The cubic root of 139742650 is about 518.9310511401.

The spelling of 139742650 in words is "one hundred thirty-nine million, seven hundred forty-two thousand, six hundred fifty".