1201001240 has 32 divisors (see below), whose sum is σ = 2727054000. Its totient is φ = 475991424.

The previous prime is 1201001231. The next prime is 1201001251. The reversal of 1201001240 is 421001021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133370 + ... + 142089.

Almost surely, 2^1201001240 is an apocalyptic number.

1201001240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201001240 is an abundant number, since it is smaller than the sum of its proper divisors (1526052760).

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

1201001240 is a wasteful number, since it uses less digits than its factorization.

1201001240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275579 (or 275575 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1201001240 is about 34655.4647927279. The cubic root of 1201001240 is about 1062.9540359847.

Adding to 1201001240 its reverse (421001021), we get a palindrome (1622002261).

The spelling of 1201001240 in words is "one billion, two hundred one million, one thousand, two hundred forty".