1201954243 has 16 divisors (see below), whose sum is σ = 1402444800. Its totient is φ = 1008856800.

The previous prime is 1201954241. The next prime is 1201954249. The reversal of 1201954243 is 3424591021.

It is not a de Polignac number, because 1201954243 - 2¹ = 1201954241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201954241) 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, 65938 + ... + 82168.

It is an arithmetic number, because the mean of its divisors is an integer number (87652800).

Almost surely, 2^1201954243 is an apocalyptic number.

1201954243 is a deficient number, since it is larger than the sum of its proper divisors (200490557).

1201954243 is a wasteful number, since it uses less digits than its factorization.

1201954243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16458.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1201954243 is about 34669.2117447167. The cubic root of 1201954243 is about 1063.2351155065.

The spelling of 1201954243 in words is "one billion, two hundred one million, nine hundred fifty-four thousand, two hundred forty-three".