6991272 has 40 divisors (see below), whose sum is σ = 19583850. Its totient is φ = 2330208.

The previous prime is 6991253. The next prime is 6991277. The reversal of 6991272 is 2721996.

It can be written as a sum of positive squares in only one way, i.e., 6081156 + 910116 = 2466^2 + 954^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (6991277) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4747 + ... + 6042.

Almost surely, 2^6991272 is an apocalyptic number.

It is an amenable number.

6991272 is an abundant number, since it is smaller than the sum of its proper divisors (12592578).

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

6991272 is a wasteful number, since it uses less digits than its factorization.

6991272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10807 (or 10794 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 6991272 is about 2644.1013596305. The cubic root of 6991272 is about 191.2135801469.

The spelling of 6991272 in words is "six million, nine hundred ninety-one thousand, two hundred seventy-two".