1263522542 has 8 divisors (see below), whose sum is σ = 1896771816. Its totient is φ = 631265272.

The previous prime is 1263522539. The next prime is 1263522563. The reversal of 1263522542 is 2452253621.

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

It is a junction number, because it is equal to n+sod(n) for n = 1263522499 and 1263522508.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 244808 + ... + 249915.

It is an arithmetic number, because the mean of its divisors is an integer number (237096477).

Almost surely, 2^1263522542 is an apocalyptic number.

1263522542 is a deficient number, since it is larger than the sum of its proper divisors (633249274).

1263522542 is a wasteful number, since it uses less digits than its factorization.

1263522542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496002.

The product of its digits is 28800, while the sum is 32.

The square root of 1263522542 is about 35546.0622573021. The cubic root of 1263522542 is about 1081.0878790109.

The spelling of 1263522542 in words is "one billion, two hundred sixty-three million, five hundred twenty-two thousand, five hundred forty-two".