1101861025 has 12 divisors (see below), whose sum is σ = 1398083632. Its totient is φ = 860988240.

The previous prime is 1101860971. The next prime is 1101861031. The reversal of 1101861025 is 5201681011.

It is a happy number.

It is not a de Polignac number, because 1101861025 - 2⁷ = 1101860897 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 511419 + ... + 513568.

Almost surely, 2^1101861025 is an apocalyptic number.

It is an amenable number.

1101861025 is a deficient number, since it is larger than the sum of its proper divisors (296222607).

1101861025 is a wasteful number, since it uses less digits than its factorization.

1101861025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025040 (or 1025035 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 25.

The square root of 1101861025 is about 33194.2920545084. The cubic root of 1101861025 is about 1032.8619387052.

The spelling of 1101861025 in words is "one billion, one hundred one million, eight hundred sixty-one thousand, twenty-five".