1540454 has 4 divisors (see below), whose sum is σ = 2310684. Its totient is φ = 770226.

The previous prime is 1540453. The next prime is 1540477. The reversal of 1540454 is 4540451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4540451 = 269 ⋅16879.

It is a super-2 number, since 2×1540454² = 4745997052232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 385112 + ... + 385115.

It is an arithmetic number, because the mean of its divisors is an integer number (577671).

2^1540454 is an apocalyptic number.

1540454 is a deficient number, since it is larger than the sum of its proper divisors (770230).

1540454 is an equidigital number, since it uses as much as digits as its factorization.

1540454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770229.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 1540454 is about 1241.1502729323. The cubic root of 1540454 is about 115.4913819523.

The spelling of 1540454 in words is "one million, five hundred forty thousand, four hundred fifty-four".