1972647 has 8 divisors (see below), whose sum is σ = 2922480. Its totient is φ = 1315080.

The previous prime is 1972643. The next prime is 1972651. The reversal of 1972647 is 7462791.

It is a happy number.

1972647 is a `hidden beast` number, since 1 + 9 + 7 + 2 + 647 = 666.

It is an interprime number because it is at equal distance from previous prime (1972643) and next prime (1972651).

It is not a de Polignac number, because 1972647 - 2² = 1972643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1972643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36504 + ... + 36557.

It is an arithmetic number, because the mean of its divisors is an integer number (365310).

2^1972647 is an apocalyptic number.

1972647 is a deficient number, since it is larger than the sum of its proper divisors (949833).

1972647 is an equidigital number, since it uses as much as digits as its factorization.

1972647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73070 (or 73064 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 1972647 is about 1404.5095229296. The cubic root of 1972647 is about 125.4150894138.

The spelling of 1972647 in words is "one million, nine hundred seventy-two thousand, six hundred forty-seven".