1263025401 has 16 divisors (see below), whose sum is σ = 1853987520. Its totient is φ = 758445120.

The previous prime is 1263025397. The next prime is 1263025403. The reversal of 1263025401 is 1045203621.

It is not a de Polignac number, because 1263025401 - 2² = 1263025397 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1263025403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171970 + ... + 179163.

It is an arithmetic number, because the mean of its divisors is an integer number (115874220).

Almost surely, 2^1263025401 is an apocalyptic number.

1263025401 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1263025401 is a deficient number, since it is larger than the sum of its proper divisors (590962119).

1263025401 is a wasteful number, since it uses less digits than its factorization.

1263025401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351256.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1263025401 is about 35539.0686569021. The cubic root of 1263025401 is about 1080.9460734383.

The spelling of 1263025401 in words is "one billion, two hundred sixty-three million, twenty-five thousand, four hundred one".