139470442 has 8 divisors (see below), whose sum is σ = 212071716. Its totient is φ = 68779872.

The previous prime is 139470439. The next prime is 139470451. The reversal of 139470442 is 244074931.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 135932281 + 3538161 = 11659^2 + 1881^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 139470398 and 139470407.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 477493 + ... + 477784.

Almost surely, 2^139470442 is an apocalyptic number.

139470442 is a deficient number, since it is larger than the sum of its proper divisors (72601274).

139470442 is an equidigital number, since it uses as much as digits as its factorization.

139470442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955352.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 139470442 is about 11809.7604548102. The cubic root of 139470442 is about 518.5938861148.

The spelling of 139470442 in words is "one hundred thirty-nine million, four hundred seventy thousand, four hundred forty-two".