2151701 has 2 divisors, whose sum is σ = 2151702. Its totient is φ = 2151700.

The previous prime is 2151683. The next prime is 2151703. The reversal of 2151701 is 1071512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2146225 + 5476 = 1465^2 + 74^2 .

It is a cyclic number.

It is not a de Polignac number, because 2151701 - 2⁶ = 2151637 is a prime.

Together with 2151703, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2151701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2151703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1075850 + 1075851.

It is an arithmetic number, because the mean of its divisors is an integer number (1075851).

2^2151701 is an apocalyptic number.

It is an amenable number.

2151701 is a deficient number, since it is larger than the sum of its proper divisors (1).

2151701 is an equidigital number, since it uses as much as digits as its factorization.

2151701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70, while the sum is 17.

The square root of 2151701 is about 1466.8677513668. The cubic root of 2151701 is about 129.1003165765.

The spelling of 2151701 in words is "two million, one hundred fifty-one thousand, seven hundred one".