1542202457 has 2 divisors, whose sum is σ = 1542202458. Its totient is φ = 1542202456.

The previous prime is 1542202429. The next prime is 1542202489. The reversal of 1542202457 is 7542022451.

It is an a-pointer prime, because the next prime (1542202489) can be obtained adding 1542202457 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1457636041 + 84566416 = 38179^2 + 9196^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1542202457 is a prime.

It is not a weakly prime, because it can be changed into another prime (1542202157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 771101228 + 771101229.

It is an arithmetic number, because the mean of its divisors is an integer number (771101229).

Almost surely, 2^1542202457 is an apocalyptic number.

It is an amenable number.

1542202457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1542202457 is an equidigital number, since it uses as much as digits as its factorization.

1542202457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22400, while the sum is 32.

The square root of 1542202457 is about 39270.8856151730. The cubic root of 1542202457 is about 1155.3506071277.

The spelling of 1542202457 in words is "one billion, five hundred forty-two million, two hundred two thousand, four hundred fifty-seven".