1146821521 has 2 divisors, whose sum is σ = 1146821522. Its totient is φ = 1146821520.

The previous prime is 1146821483. The next prime is 1146821531. The reversal of 1146821521 is 1251286411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1104831121 + 41990400 = 33239^2 + 6480^2 .

It is a cyclic number.

It is not a de Polignac number, because 1146821521 - 2¹³ = 1146813329 is a prime.

It is not a weakly prime, because it can be changed into another prime (1146821531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 573410760 + 573410761.

It is an arithmetic number, because the mean of its divisors is an integer number (573410761).

Almost surely, 2^1146821521 is an apocalyptic number.

It is an amenable number.

1146821521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1146821521 is an equidigital number, since it uses as much as digits as its factorization.

1146821521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3840, while the sum is 31.

The square root of 1146821521 is about 33864.7533727916. The cubic root of 1146821521 is about 1046.7234279715.

The spelling of 1146821521 in words is "one billion, one hundred forty-six million, eight hundred twenty-one thousand, five hundred twenty-one".