1263033157 has 4 divisors (see below), whose sum is σ = 1265245696. Its totient is φ = 1260820620.

The previous prime is 1263033103. The next prime is 1263033193. The reversal of 1263033157 is 7513303621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7513303621 = 1483 ⋅5066287.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1263033157 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 (1263033197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1105413 + ... + 1106554.

It is an arithmetic number, because the mean of its divisors is an integer number (316311424).

Almost surely, 2^1263033157 is an apocalyptic number.

It is an amenable number.

1263033157 is a deficient number, since it is larger than the sum of its proper divisors (2212539).

1263033157 is an equidigital number, since it uses as much as digits as its factorization.

1263033157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2212538.

The product of its (nonzero) digits is 11340, while the sum is 31.

The square root of 1263033157 is about 35539.1777760826. The cubic root of 1263033157 is about 1080.9482860622.

Adding to 1263033157 its reverse (7513303621), we get a palindrome (8776336778).

The spelling of 1263033157 in words is "one billion, two hundred sixty-three million, thirty-three thousand, one hundred fifty-seven".