1442152561 has 2 divisors, whose sum is σ = 1442152562. Its totient is φ = 1442152560.

The previous prime is 1442152553. The next prime is 1442152577. The reversal of 1442152561 is 1652512441.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1434970161 + 7182400 = 37881^2 + 2680^2 .

It is a cyclic number.

It is not a de Polignac number, because 1442152561 - 2³ = 1442152553 is a prime.

It is not a weakly prime, because it can be changed into another prime (1442152511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 721076280 + 721076281.

It is an arithmetic number, because the mean of its divisors is an integer number (721076281).

Almost surely, 2^1442152561 is an apocalyptic number.

It is an amenable number.

1442152561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1442152561 is an equidigital number, since it uses as much as digits as its factorization.

1442152561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9600, while the sum is 31.

The square root of 1442152561 is about 37975.6838121448. The cubic root of 1442152561 is about 1129.8056315912.

The spelling of 1442152561 in words is "one billion, four hundred forty-two million, one hundred fifty-two thousand, five hundred sixty-one".