1540248049 has 4 divisors (see below), whose sum is σ = 1543411264. Its totient is φ = 1537084836.

The previous prime is 1540248043. The next prime is 1540248067. The reversal of 1540248049 is 9408420451.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9408420451 = 53 ⋅177517367.

It is a cyclic number.

It is not a de Polignac number, because 1540248049 - 2⁷ = 1540247921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1540247999 and 1540248017.

It is not an unprimeable number, because it can be changed into a prime (1540248043) 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, 1580877 + ... + 1581850.

It is an arithmetic number, because the mean of its divisors is an integer number (385852816).

Almost surely, 2^1540248049 is an apocalyptic number.

It is an amenable number.

1540248049 is a deficient number, since it is larger than the sum of its proper divisors (3163215).

1540248049 is an equidigital number, since it uses as much as digits as its factorization.

1540248049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3163214.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 1540248049 is about 39245.9940503486. The cubic root of 1540248049 is about 1154.8623484937.

The spelling of 1540248049 in words is "one billion, five hundred forty million, two hundred forty-eight thousand, forty-nine".