1247772 has 12 divisors (see below), whose sum is σ = 2911496. Its totient is φ = 415920.

The previous prime is 1247767. The next prime is 1247777. The reversal of 1247772 is 2777421.

It is an interprime number because it is at equal distance from previous prime (1247767) and next prime (1247777).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51979 + ... + 52002.

2^1247772 is an apocalyptic number.

1247772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1247772 is an abundant number, since it is smaller than the sum of its proper divisors (1663724).

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

1247772 is a wasteful number, since it uses less digits than its factorization.

1247772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103988 (or 103986 counting only the distinct ones).

The product of its digits is 5488, while the sum is 30.

The square root of 1247772 is about 1117.0371524708. The cubic root of 1247772 is about 107.6576953655.

The spelling of 1247772 in words is "one million, two hundred forty-seven thousand, seven hundred seventy-two".