7507138 has 4 divisors (see below), whose sum is σ = 11260710. Its totient is φ = 3753568.

The previous prime is 7507127. The next prime is 7507153. The reversal of 7507138 is 8317057.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8317057 = 7 ⋅1188151.

It can be written as a sum of positive squares in only one way, i.e., 3908529 + 3598609 = 1977^2 + 1897^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1876783 + ... + 1876786.

Almost surely, 2^7507138 is an apocalyptic number.

7507138 is a deficient number, since it is larger than the sum of its proper divisors (3753572).

7507138 is a wasteful number, since it uses less digits than its factorization.

7507138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3753571.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 7507138 is about 2739.9156921336. The cubic root of 7507138 is about 195.8054608689.

The spelling of 7507138 in words is "seven million, five hundred seven thousand, one hundred thirty-eight".