1542472391 has 8 divisors (see below), whose sum is σ = 1653038304. Its totient is φ = 1435531680.

The previous prime is 1542472381. The next prime is 1542472411. The reversal of 1542472391 is 1932742451.

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

It is a cyclic number.

It is not a de Polignac number, because 1542472391 - 2¹⁰ = 1542471367 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 (1542472331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 905420 + ... + 907121.

It is an arithmetic number, because the mean of its divisors is an integer number (206629788).

Almost surely, 2^1542472391 is an apocalyptic number.

1542472391 is a deficient number, since it is larger than the sum of its proper divisors (110565913).

1542472391 is a wasteful number, since it uses less digits than its factorization.

1542472391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1812601.

The product of its digits is 60480, while the sum is 38.

The square root of 1542472391 is about 39274.3222856869. The cubic root of 1542472391 is about 1155.4180107762.

The spelling of 1542472391 in words is "one billion, five hundred forty-two million, four hundred seventy-two thousand, three hundred ninety-one".