1241572061 has 4 divisors (see below), whose sum is σ = 1241657724. Its totient is φ = 1241486400.

The previous prime is 1241572051. The next prime is 1241572121. The reversal of 1241572061 is 1602751421.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1602751421 = 67 ⋅23921663.

It can be written as a sum of positive squares in 2 ways, for example, as 1211388025 + 30184036 = 34805^2 + 5494^2 .

It is a cyclic number.

It is not a de Polignac number, because 1241572061 - 2¹⁴ = 1241555677 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1241572051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15110 + ... + 52071.

It is an arithmetic number, because the mean of its divisors is an integer number (310414431).

Almost surely, 2^1241572061 is an apocalyptic number.

It is an amenable number.

1241572061 is a deficient number, since it is larger than the sum of its proper divisors (85663).

1241572061 is an equidigital number, since it uses as much as digits as its factorization.

1241572061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85662.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 1241572061 is about 35235.9484191926. The cubic root of 1241572061 is about 1074.7908909294.

The spelling of 1241572061 in words is "one billion, two hundred forty-one million, five hundred seventy-two thousand, sixty-one".