1201129450 has 12 divisors (see below), whose sum is σ = 2234100870. Its totient is φ = 480451760.

The previous prime is 1201129439. The next prime is 1201129459. The reversal of 1201129450 is 549211021.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 966028561 + 235100889 = 31081^2 + 15333^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1201129459) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 12011245 + ... + 12011344.

Almost surely, 2^1201129450 is an apocalyptic number.

1201129450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1201129450 is a deficient number, since it is larger than the sum of its proper divisors (1032971420).

1201129450 is a wasteful number, since it uses less digits than its factorization.

1201129450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24022601 (or 24022596 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 1201129450 is about 34657.3145237769. The cubic root of 1201129450 is about 1062.9918590064.

The spelling of 1201129450 in words is "one billion, two hundred one million, one hundred twenty-nine thousand, four hundred fifty".