1203225991 has 8 divisors (see below), whose sum is σ = 1340538624. Its totient is φ = 1070568120.

The previous prime is 1203225973. The next prime is 1203226001. The reversal of 1203225991 is 1995223021.

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

It is a cyclic number.

It is not a de Polignac number, because 1203225991 - 2⁹ = 1203225479 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 (1203225911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1163145 + ... + 1164178.

It is an arithmetic number, because the mean of its divisors is an integer number (167567328).

Almost surely, 2^1203225991 is an apocalyptic number.

1203225991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1203225991 is a deficient number, since it is larger than the sum of its proper divisors (137312633).

1203225991 is a wasteful number, since it uses less digits than its factorization.

1203225991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2327381.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 1203225991 is about 34687.5480684352. The cubic root of 1203225991 is about 1063.6099746232.

The spelling of 1203225991 in words is "one billion, two hundred three million, two hundred twenty-five thousand, nine hundred ninety-one".