1972511 has 2 divisors, whose sum is σ = 1972512. Its totient is φ = 1972510.

The previous prime is 1972483. The next prime is 1972541. The reversal of 1972511 is 1152791.

It is a weak prime.

It is an emirp because it is prime and its reverse (1152791) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1972511 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1972541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986255 + 986256.

It is an arithmetic number, because the mean of its divisors is an integer number (986256).

2^1972511 is an apocalyptic number.

1972511 is a deficient number, since it is larger than the sum of its proper divisors (1).

1972511 is an equidigital number, since it uses as much as digits as its factorization.

1972511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 630, while the sum is 26.

The square root of 1972511 is about 1404.4611066171. The cubic root of 1972511 is about 125.4122071877.

The spelling of 1972511 in words is "one million, nine hundred seventy-two thousand, five hundred eleven".