1542627491 has 2 divisors, whose sum is σ = 1542627492. Its totient is φ = 1542627490.

The previous prime is 1542627473. The next prime is 1542627529. The reversal of 1542627491 is 1947262451.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1542627491 - 2¹⁰ = 1542626467 is a prime.

It is not a weakly prime, because it can be changed into another prime (1542627431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 771313745 + 771313746.

It is an arithmetic number, because the mean of its divisors is an integer number (771313746).

Almost surely, 2^1542627491 is an apocalyptic number.

1542627491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1542627491 is an equidigital number, since it uses as much as digits as its factorization.

1542627491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 41.

The square root of 1542627491 is about 39276.2968086351. The cubic root of 1542627491 is about 1155.4567363375.

The spelling of 1542627491 in words is "one billion, five hundred forty-two million, six hundred twenty-seven thousand, four hundred ninety-one".