1207138 has 4 divisors (see below), whose sum is σ = 1810710. Its totient is φ = 603568.

The previous prime is 1207133. The next prime is 1207147. The reversal of 1207138 is 8317021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8317021 = 31 ⋅268291.

It can be written as a sum of positive squares in only one way, i.e., 1075369 + 131769 = 1037^2 + 363^2 .

It is an Ulam number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1207133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 301783 + ... + 301786.

2^1207138 is an apocalyptic number.

1207138 is a deficient number, since it is larger than the sum of its proper divisors (603572).

1207138 is an equidigital number, since it uses as much as digits as its factorization.

1207138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603571.

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

The square root of 1207138 is about 1098.6983207414. The cubic root of 1207138 is about 106.4761420986.

The spelling of 1207138 in words is "one million, two hundred seven thousand, one hundred thirty-eight".