1256263630 has 8 divisors (see below), whose sum is σ = 2261274552. Its totient is φ = 502505448.

The previous prime is 1256263607. The next prime is 1256263633. The reversal of 1256263630 is 363626521.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256263633) 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, 62813172 + ... + 62813191.

It is an arithmetic number, because the mean of its divisors is an integer number (282659319).

Almost surely, 2^1256263630 is an apocalyptic number.

1256263630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1256263630 is a deficient number, since it is larger than the sum of its proper divisors (1005010922).

1256263630 is a wasteful number, since it uses less digits than its factorization.

1256263630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125626370.

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 1256263630 is about 35443.8094735879. The cubic root of 1256263630 is about 1079.0136255864.

The spelling of 1256263630 in words is "one billion, two hundred fifty-six million, two hundred sixty-three thousand, six hundred thirty".