1147220 has 24 divisors (see below), whose sum is σ = 2536800. Its totient is φ = 434592.

The previous prime is 1147213. The next prime is 1147229. The reversal of 1147220 is 227411.

1147220 = T₈₁ + T₈₂ + ... + T₁₉₄.

It is a super-2 number, since 2×1147220² = 2632227456800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1147229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1130 + ... + 1889.

It is an arithmetic number, because the mean of its divisors is an integer number (105700).

2^1147220 is an apocalyptic number.

1147220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1147220 is an abundant number, since it is smaller than the sum of its proper divisors (1389580).

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

1147220 is a wasteful number, since it uses less digits than its factorization.

1147220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3047 (or 3045 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 1147220 is about 1071.0835635001. The cubic root of 1147220 is about 104.6844646777.

The spelling of 1147220 in words is "one million, one hundred forty-seven thousand, two hundred twenty".