139772061 has 60 divisors (see below), whose sum is σ = 247381596. Its totient is φ = 78122880.

The previous prime is 139772041. The next prime is 139772071. The reversal of 139772061 is 160277931.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 29648025 + 110124036 = 5445^2 + 10494^2 .

It is not a de Polignac number, because 139772061 - 2⁵ = 139772029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139772021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 126865 + ... + 127961.

Almost surely, 2^139772061 is an apocalyptic number.

139772061 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

139772061 is a deficient number, since it is larger than the sum of its proper divisors (107609535).

139772061 is a wasteful number, since it uses less digits than its factorization.

139772061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144 (or 1124 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The square root of 139772061 is about 11822.5234615965. The cubic root of 139772061 is about 518.9674542724.

The spelling of 139772061 in words is "one hundred thirty-nine million, seven hundred seventy-two thousand, sixty-one".