139781450 has 24 divisors (see below), whose sum is σ = 268961580. Its totient is φ = 53984000.

The previous prime is 139781441. The next prime is 139781459. The reversal of 139781450 is 54187931.

It is an interprime number because it is at equal distance from previous prime (139781441) and next prime (139781459).

It can be written as a sum of positive squares in 6 ways, for example, as 10936249 + 128845201 = 3307^2 + 11351^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (139781459) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46751 + ... + 49650.

Almost surely, 2^139781450 is an apocalyptic number.

139781450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139781450 is a deficient number, since it is larger than the sum of its proper divisors (129180130).

139781450 is a wasteful number, since it uses less digits than its factorization.

139781450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96442 (or 96437 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 139781450 is about 11822.9205359759. The cubic root of 139781450 is about 518.9790743256.

The spelling of 139781450 in words is "one hundred thirty-nine million, seven hundred eighty-one thousand, four hundred fifty".