1564741 has 2 divisors, whose sum is σ = 1564742. Its totient is φ = 1564740.

The previous prime is 1564729. The next prime is 1564747. The reversal of 1564741 is 1474651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 792100 + 772641 = 890^2 + 879^2 .

It is a cyclic number.

It is not a de Polignac number, because 1564741 - 2¹⁷ = 1433669 is a prime.

It is a Chen prime.

It is equal to p₁₁₈₆₉₃ and since 1564741 and 118693 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1564747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 782370 + 782371.

It is an arithmetic number, because the mean of its divisors is an integer number (782371).

2^1564741 is an apocalyptic number.

It is an amenable number.

1564741 is a deficient number, since it is larger than the sum of its proper divisors (1).

1564741 is an equidigital number, since it uses as much as digits as its factorization.

1564741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 28.

The square root of 1564741 is about 1250.8960788171. The cubic root of 1564741 is about 116.0951706091.

The spelling of 1564741 in words is "one million, five hundred sixty-four thousand, seven hundred forty-one".