1542997 has 2 divisors, whose sum is σ = 1542998. Its totient is φ = 1542996.

The previous prime is 1542991. The next prime is 1543007. The reversal of 1542997 is 7992451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1540081 + 2916 = 1241^2 + 54^2 .

It is a cyclic number.

It is not a de Polignac number, because 1542997 - 2¹¹ = 1540949 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1542991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 771498 + 771499.

It is an arithmetic number, because the mean of its divisors is an integer number (771499).

2^1542997 is an apocalyptic number.

It is an amenable number.

1542997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1542997 is an equidigital number, since it uses as much as digits as its factorization.

1542997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 37.

The square root of 1542997 is about 1242.1743033890. The cubic root of 1542997 is about 115.5548985348.

The spelling of 1542997 in words is "one million, five hundred forty-two thousand, nine hundred ninety-seven".