139247450 has 12 divisors (see below), whose sum is σ = 259000350. Its totient is φ = 55698960.

The previous prime is 139247441. The next prime is 139247461. The reversal of 139247450 is 54742931.

It can be written as a sum of positive squares in 3 ways, for example, as 116618401 + 22629049 = 10799^2 + 4757^2 .

It is a super-3 number, since 3×139247450³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 139247450.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1392425 + ... + 1392524.

Almost surely, 2^139247450 is an apocalyptic number.

139247450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139247450 is a deficient number, since it is larger than the sum of its proper divisors (119752900).

139247450 is a wasteful number, since it uses less digits than its factorization.

139247450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2784961 (or 2784956 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 139247450 is about 11800.3156737436. The cubic root of 139247450 is about 518.3173544654.

The spelling of 139247450 in words is "one hundred thirty-nine million, two hundred forty-seven thousand, four hundred fifty".