1542861493 has 8 divisors (see below), whose sum is σ = 1554638400. Its totient is φ = 1531123968.

The previous prime is 1542861487. The next prime is 1542861499. The reversal of 1542861493 is 3941682451.

It is an interprime number because it is at equal distance from previous prime (1542861487) and next prime (1542861499).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1542861493 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 (1542861499) 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 7 ways as a sum of consecutive naturals, for example, 71328 + ... + 90406.

It is an arithmetic number, because the mean of its divisors is an integer number (194329800).

Almost surely, 2^1542861493 is an apocalyptic number.

It is an amenable number.

1542861493 is a deficient number, since it is larger than the sum of its proper divisors (11776907).

1542861493 is a wasteful number, since it uses less digits than its factorization.

1542861493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19691.

The product of its digits is 207360, while the sum is 43.

The square root of 1542861493 is about 39279.2756170477. The cubic root of 1542861493 is about 1155.5151573364.

The spelling of 1542861493 in words is "one billion, five hundred forty-two million, eight hundred sixty-one thousand, four hundred ninety-three".