1545254042 has 4 divisors (see below), whose sum is σ = 2317881066. Its totient is φ = 772627020.

The previous prime is 1545254027. The next prime is 1545254047. The reversal of 1545254042 is 2404525451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2404525451 = 181 ⋅13284671.

It can be written as a sum of positive squares in only one way, i.e., 1169708401 + 375545641 = 34201^2 + 19379^2 .

It is not an unprimeable number, because it can be changed into a prime (1545254047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 386313509 + ... + 386313512.

Almost surely, 2^1545254042 is an apocalyptic number.

1545254042 is a deficient number, since it is larger than the sum of its proper divisors (772627024).

1545254042 is an equidigital number, since it uses as much as digits as its factorization.

1545254042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772627023.

The product of its (nonzero) digits is 32000, while the sum is 32.

The square root of 1545254042 is about 39309.7194342570. The cubic root of 1545254042 is about 1156.1121430501.

Adding to 1545254042 its reverse (2404525451), we get a palindrome (3949779493).

The spelling of 1545254042 in words is "one billion, five hundred forty-five million, two hundred fifty-four thousand, forty-two".