1247447406 has 32 divisors (see below), whose sum is σ = 2535540480. Its totient is φ = 409058496.

The previous prime is 1247447393. The next prime is 1247447447. The reversal of 1247447406 is 6047447421.

It is a happy number.

It is a super-2 number, since 2×1247447406² = 3112250061472257672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 387130 + ... + 390338.

It is an arithmetic number, because the mean of its divisors is an integer number (79235640).

Almost surely, 2^1247447406 is an apocalyptic number.

1247447406 is an abundant number, since it is smaller than the sum of its proper divisors (1288093074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1247447406 is a wasteful number, since it uses less digits than its factorization.

1247447406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4248.

The product of its (nonzero) digits is 150528, while the sum is 39.

The square root of 1247447406 is about 35319.2214806612. The cubic root of 1247447406 is about 1076.4835923880.

The spelling of 1247447406 in words is "one billion, two hundred forty-seven million, four hundred forty-seven thousand, four hundred six".