1245921353 has 2 divisors, whose sum is σ = 1245921354. Its totient is φ = 1245921352.

The previous prime is 1245921337. The next prime is 1245921361. The reversal of 1245921353 is 3531295421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1204922944 + 40998409 = 34712^2 + 6403^2 .

It is a cyclic number.

It is not a de Polignac number, because 1245921353 - 2⁴ = 1245921337 is a prime.

It is a super-2 number, since 2×1245921353² = 3104640035722701218, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1245921373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622960676 + 622960677.

It is an arithmetic number, because the mean of its divisors is an integer number (622960677).

Almost surely, 2^1245921353 is an apocalyptic number.

It is an amenable number.

1245921353 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245921353 is an equidigital number, since it uses as much as digits as its factorization.

1245921353 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 35.

The square root of 1245921353 is about 35297.6111514646. The cubic root of 1245921353 is about 1076.0444445856.

The spelling of 1245921353 in words is "one billion, two hundred forty-five million, nine hundred twenty-one thousand, three hundred fifty-three".