1201951267 has 16 divisors (see below), whose sum is σ = 1397721600. Its totient is φ = 1022055840.

The previous prime is 1201951217. The next prime is 1201951307. The reversal of 1201951267 is 7621591021.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201951267 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201951217) 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 15 ways as a sum of consecutive naturals, for example, 19888 + ... + 52909.

It is an arithmetic number, because the mean of its divisors is an integer number (87357600).

Almost surely, 2^1201951267 is an apocalyptic number.

1201951267 is a deficient number, since it is larger than the sum of its proper divisors (195770333).

1201951267 is a wasteful number, since it uses less digits than its factorization.

1201951267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72906.

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 1201951267 is about 34669.1688247642. The cubic root of 1201951267 is about 1063.2342379938.

The spelling of 1201951267 in words is "one billion, two hundred one million, nine hundred fifty-one thousand, two hundred sixty-seven".