1214075521 has 2 divisors, whose sum is σ = 1214075522. Its totient is φ = 1214075520.

The previous prime is 1214075501. The next prime is 1214075531. The reversal of 1214075521 is 1255704121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1057550400 + 156525121 = 32520^2 + 12511^2 .

It is a cyclic number.

It is not a de Polignac number, because 1214075521 - 2¹¹ = 1214073473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1214075521.

It is not a weakly prime, because it can be changed into another prime (1214075501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607037760 + 607037761.

It is an arithmetic number, because the mean of its divisors is an integer number (607037761).

Almost surely, 2^1214075521 is an apocalyptic number.

It is an amenable number.

1214075521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1214075521 is an equidigital number, since it uses as much as digits as its factorization.

1214075521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 1214075521 is about 34843.5865117241. The cubic root of 1214075521 is about 1066.7972829091.

Adding to 1214075521 its reverse (1255704121), we get a palindrome (2469779642).

The spelling of 1214075521 in words is "one billion, two hundred fourteen million, seventy-five thousand, five hundred twenty-one".