1545641 has 2 divisors, whose sum is σ = 1545642. Its totient is φ = 1545640.

The previous prime is 1545619. The next prime is 1545647. The reversal of 1545641 is 1465451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 912025 + 633616 = 955^2 + 796^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1545641 is a prime.

It is a super-2 number, since 2×1545641² = 4778012201762, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1545641.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1545647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 772820 + 772821.

It is an arithmetic number, because the mean of its divisors is an integer number (772821).

2^1545641 is an apocalyptic number.

It is an amenable number.

1545641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1545641 is an equidigital number, since it uses as much as digits as its factorization.

1545641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2400, while the sum is 26.

The square root of 1545641 is about 1243.2381107415. The cubic root of 1545641 is about 115.6208638404.

The spelling of 1545641 in words is "one million, five hundred forty-five thousand, six hundred forty-one".