7564138 has 4 divisors (see below), whose sum is σ = 11346210. Its totient is φ = 3782068.

The previous prime is 7564129. The next prime is 7564159. The reversal of 7564138 is 8314657.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8314657 = 13 ⋅639589.

It can be written as a sum of positive squares in only one way, i.e., 5121169 + 2442969 = 2263^2 + 1563^2 .

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1891033 + ... + 1891036.

Almost surely, 2^7564138 is an apocalyptic number.

7564138 is a deficient number, since it is larger than the sum of its proper divisors (3782072).

7564138 is a wasteful number, since it uses less digits than its factorization.

7564138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3782071.

The product of its digits is 20160, while the sum is 34.

The square root of 7564138 is about 2750.2978020571. The cubic root of 7564138 is about 196.2997807371.

The spelling of 7564138 in words is "seven million, five hundred sixty-four thousand, one hundred thirty-eight".