1245150121 has 2 divisors, whose sum is σ = 1245150122. Its totient is φ = 1245150120.

The previous prime is 1245150089. The next prime is 1245150131. The reversal of 1245150121 is 1210515421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 888695721 + 356454400 = 29811^2 + 18880^2 .

It is a cyclic number.

It is not a de Polignac number, because 1245150121 - 2⁵ = 1245150089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1245150092 and 1245150101.

It is not a weakly prime, because it can be changed into another prime (1245150131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622575060 + 622575061.

It is an arithmetic number, because the mean of its divisors is an integer number (622575061).

Almost surely, 2^1245150121 is an apocalyptic number.

It is an amenable number.

1245150121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245150121 is an equidigital number, since it uses as much as digits as its factorization.

1245150121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 1245150121 is about 35286.6847550177. The cubic root of 1245150121 is about 1075.8223729973.

Adding to 1245150121 its reverse (1210515421), we get a palindrome (2455665542).

The spelling of 1245150121 in words is "one billion, two hundred forty-five million, one hundred fifty thousand, one hundred twenty-one".