1645151 has 2 divisors, whose sum is σ = 1645152. Its totient is φ = 1645150.

The previous prime is 1645129. The next prime is 1645157. The reversal of 1645151 is 1515461.

It is a strong prime.

It is an emirp because it is prime and its reverse (1515461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1645151 - 2⁶ = 1645087 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 (1645157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 822575 + 822576.

It is an arithmetic number, because the mean of its divisors is an integer number (822576).

2^1645151 is an apocalyptic number.

1645151 is a deficient number, since it is larger than the sum of its proper divisors (1).

1645151 is an equidigital number, since it uses as much as digits as its factorization.

1645151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 600, while the sum is 23.

The square root of 1645151 is about 1282.6343984160. The cubic root of 1645151 is about 118.0507059682.

The spelling of 1645151 in words is "one million, six hundred forty-five thousand, one hundred fifty-one".