1540349 has 4 divisors (see below), whose sum is σ = 1621440. Its totient is φ = 1459260.

The previous prime is 1540337. The next prime is 1540367. The reversal of 1540349 is 9430451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1540349 - 2²⁰ = 491773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40517 + ... + 40554.

It is an arithmetic number, because the mean of its divisors is an integer number (405360).

2^1540349 is an apocalyptic number.

1540349 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1540349 is a deficient number, since it is larger than the sum of its proper divisors (81091).

1540349 is an equidigital number, since it uses as much as digits as its factorization.

1540349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81090.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1540349 is about 1241.1079727405. The cubic root of 1540349 is about 115.4887578621.

The spelling of 1540349 in words is "one million, five hundred forty thousand, three hundred forty-nine".