1201621072 has 20 divisors (see below), whose sum is σ = 2350747360. Its totient is φ = 594976608.

The previous prime is 1201621067. The next prime is 1201621073. The reversal of 1201621072 is 2701261021.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201621073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362922 + ... + 366217.

It is an arithmetic number, because the mean of its divisors is an integer number (117537368).

Almost surely, 2^1201621072 is an apocalyptic number.

It is an amenable number.

1201621072 is a deficient number, since it is larger than the sum of its proper divisors (1149126288).

1201621072 is a wasteful number, since it uses less digits than its factorization.

1201621072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729250 (or 729244 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 1201621072 is about 34664.4064134957. The cubic root of 1201621072 is about 1063.1368666632.

Adding to 1201621072 its reverse (2701261021), we get a palindrome (3902882093).

The spelling of 1201621072 in words is "one billion, two hundred one million, six hundred twenty-one thousand, seventy-two".