1201392972 has 144 divisors (see below), whose sum is σ = 3502134272. Its totient is φ = 357618240.

The previous prime is 1201392961. The next prime is 1201392989. The reversal of 1201392972 is 2792931021.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 390183 + ... + 393249.

Almost surely, 2^1201392972 is an apocalyptic number.

1201392972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1201392972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1751067136).

1201392972 is an abundant number, since it is smaller than the sum of its proper divisors (2300741300).

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

1201392972 is a wasteful number, since it uses less digits than its factorization.

1201392972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3130 (or 3116 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 1201392972 is about 34661.1161389820. The cubic root of 1201392972 is about 1063.0695917485.

The spelling of 1201392972 in words is "one billion, two hundred one million, three hundred ninety-two thousand, nine hundred seventy-two".