1201979450 has 24 divisors (see below), whose sum is σ = 2555065632. Its totient is φ = 412107120.

The previous prime is 1201979437. The next prime is 1201979453. The reversal of 1201979450 is 549791021.

It is not an unprimeable number, because it can be changed into a prime (1201979453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1716764 + ... + 1717463.

It is an arithmetic number, because the mean of its divisors is an integer number (106461068).

Almost surely, 2^1201979450 is an apocalyptic number.

1201979450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1201979450 is an abundant number, since it is smaller than the sum of its proper divisors (1353086182).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1201979450 is a wasteful number, since it uses less digits than its factorization.

1201979450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3434246 (or 3434241 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 1201979450 is about 34669.5752786215. The cubic root of 1201979450 is about 1063.2425480635.

The spelling of 1201979450 in words is "one billion, two hundred one million, nine hundred seventy-nine thousand, four hundred fifty".