1201357138 has 8 divisors (see below), whose sum is σ = 1802907900. Its totient is φ = 600387840.

The previous prime is 1201357121. The next prime is 1201357147. The reversal of 1201357138 is 8317531021.

It can be written as a sum of positive squares in 2 ways, for example, as 1157836729 + 43520409 = 34027^2 + 6597^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140163 + ... + 148486.

Almost surely, 2^1201357138 is an apocalyptic number.

1201357138 is a deficient number, since it is larger than the sum of its proper divisors (601550762).

1201357138 is a wasteful number, since it uses less digits than its factorization.

1201357138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290732.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 1201357138 is about 34660.5992158243. The cubic root of 1201357138 is about 1063.0590222359.

Adding to 1201357138 its reverse (8317531021), we get a palindrome (9518888159).

The spelling of 1201357138 in words is "one billion, two hundred one million, three hundred fifty-seven thousand, one hundred thirty-eight".