1542042501 has 4 divisors (see below), whose sum is σ = 2056056672. Its totient is φ = 1028028332.

The previous prime is 1542042499. The next prime is 1542042503. The reversal of 1542042501 is 1052402451.

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: 1052402451 = 3 ⋅350800817.

It is an interprime number because it is at equal distance from previous prime (1542042499) and next prime (1542042503).

It is a cyclic number.

It is not a de Polignac number, because 1542042501 - 2¹ = 1542042499 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1542042503) 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, 257007081 + ... + 257007086.

It is an arithmetic number, because the mean of its divisors is an integer number (514014168).

Almost surely, 2^1542042501 is an apocalyptic number.

It is an amenable number.

1542042501 is a deficient number, since it is larger than the sum of its proper divisors (514014171).

1542042501 is an equidigital number, since it uses as much as digits as its factorization.

1542042501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514014170.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 1542042501 is about 39268.8489900073. The cubic root of 1542042501 is about 1155.3106617343.

Adding to 1542042501 its reverse (1052402451), we get a palindrome (2594444952).

The spelling of 1542042501 in words is "one billion, five hundred forty-two million, forty-two thousand, five hundred one".