1245529157 has 8 divisors (see below), whose sum is σ = 1330896600. Its totient is φ = 1161506304.

The previous prime is 1245529133. The next prime is 1245529163. The reversal of 1245529157 is 7519255421.

It can be written as a sum of positive squares in 4 ways, for example, as 467900161 + 777628996 = 21631^2 + 27886^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1245529157 - 2⁸ = 1245528901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245529127) 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 7 ways as a sum of consecutive naturals, for example, 334232 + ... + 337937.

It is an arithmetic number, because the mean of its divisors is an integer number (166362075).

Almost surely, 2^1245529157 is an apocalyptic number.

1245529157 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1245529157 is a deficient number, since it is larger than the sum of its proper divisors (85367443).

1245529157 is a wasteful number, since it uses less digits than its factorization.

1245529157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672295.

The product of its digits is 126000, while the sum is 41.

The square root of 1245529157 is about 35292.0551540995. The cubic root of 1245529157 is about 1075.9315255758.

The spelling of 1245529157 in words is "one billion, two hundred forty-five million, five hundred twenty-nine thousand, one hundred fifty-seven".