1542134879 has 4 divisors (see below), whose sum is σ = 1542221520. Its totient is φ = 1542048240.

The previous prime is 1542134851. The next prime is 1542134911. The reversal of 1542134879 is 9784312451.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9784312451 = 431 ⋅22701421.

It is a cyclic number.

It is not a de Polignac number, because 1542134879 - 2⁸ = 1542134623 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 (1542134819) 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, 5774 + ... + 55835.

It is an arithmetic number, because the mean of its divisors is an integer number (385555380).

Almost surely, 2^1542134879 is an apocalyptic number.

1542134879 is a deficient number, since it is larger than the sum of its proper divisors (86641).

1542134879 is an equidigital number, since it uses as much as digits as its factorization.

1542134879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86640.

The product of its digits is 241920, while the sum is 44.

The square root of 1542134879 is about 39270.0251973436. The cubic root of 1542134879 is about 1155.3337313875. Note that the first 3 decimals are identical.

The spelling of 1542134879 in words is "one billion, five hundred forty-two million, one hundred thirty-four thousand, eight hundred seventy-nine".