1545389 has 2 divisors, whose sum is σ = 1545390. Its totient is φ = 1545388.

The previous prime is 1545371. The next prime is 1545391. The reversal of 1545389 is 9835451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1525225 + 20164 = 1235^2 + 142^2 .

It is a cyclic number.

It is not a de Polignac number, because 1545389 - 2²⁰ = 496813 is a prime.

It is a super-2 number, since 2×1545389² = 4776454322642, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 1545391, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1545329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 772694 + 772695.

It is an arithmetic number, because the mean of its divisors is an integer number (772695).

2^1545389 is an apocalyptic number.

It is an amenable number.

1545389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1545389 is an equidigital number, since it uses as much as digits as its factorization.

1545389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 35.

The square root of 1545389 is about 1243.1367583657. The cubic root of 1545389 is about 115.6145799229.

The spelling of 1545389 in words is "one million, five hundred forty-five thousand, three hundred eighty-nine".