1542490973 has 2 divisors, whose sum is σ = 1542490974. Its totient is φ = 1542490972.

The previous prime is 1542490919. The next prime is 1542490981. The reversal of 1542490973 is 3790942451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1538051524 + 4439449 = 39218^2 + 2107^2 .

It is a cyclic number.

It is not a de Polignac number, because 1542490973 - 2⁸ = 1542490717 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1542420973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 771245486 + 771245487.

It is an arithmetic number, because the mean of its divisors is an integer number (771245487).

Almost surely, 2^1542490973 is an apocalyptic number.

It is an amenable number.

1542490973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1542490973 is an equidigital number, since it uses as much as digits as its factorization.

1542490973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 1542490973 is about 39274.5588517554. The cubic root of 1542490973 is about 1155.4226504900.

The spelling of 1542490973 in words is "one billion, five hundred forty-two million, four hundred ninety thousand, nine hundred seventy-three".