1542640867 has 16 divisors (see below), whose sum is σ = 1624502880. Its totient is φ = 1463212800.

The previous prime is 1542640849. The next prime is 1542640901. The reversal of 1542640867 is 7680462451.

It is a cyclic number.

It is not a de Polignac number, because 1542640867 - 2¹⁹ = 1542116579 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1542640067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 401817 + ... + 405637.

It is an arithmetic number, because the mean of its divisors is an integer number (101531430).

Almost surely, 2^1542640867 is an apocalyptic number.

1542640867 is a deficient number, since it is larger than the sum of its proper divisors (81862013).

1542640867 is a wasteful number, since it uses less digits than its factorization.

1542640867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4134.

The product of its (nonzero) digits is 322560, while the sum is 43.

The square root of 1542640867 is about 39276.4670890853. The cubic root of 1542640867 is about 1155.4600759522.

The spelling of 1542640867 in words is "one billion, five hundred forty-two million, six hundred forty thousand, eight hundred sixty-seven".