1540453 has 2 divisors, whose sum is σ = 1540454. Its totient is φ = 1540452.

The previous prime is 1540447. The next prime is 1540477. The reversal of 1540453 is 3540451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1520289 + 20164 = 1233^2 + 142^2 .

It is an emirp because it is prime and its reverse (3540451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1540453 - 2¹⁷ = 1409381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1540403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770226 + 770227.

It is an arithmetic number, because the mean of its divisors is an integer number (770227).

2^1540453 is an apocalyptic number.

It is an amenable number.

1540453 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540453 is an equidigital number, since it uses as much as digits as its factorization.

1540453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 1540453 is about 1241.1498700802. The cubic root of 1540453 is about 115.4913569615.

The spelling of 1540453 in words is "one million, five hundred forty thousand, four hundred fifty-three".