1507138 has 4 divisors (see below), whose sum is σ = 2260710. Its totient is φ = 753568.

The previous prime is 1507123. The next prime is 1507139. The reversal of 1507138 is 8317051.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8317051 = 229 ⋅36319.

It can be written as a sum of positive squares in only one way, i.e., 1292769 + 214369 = 1137^2 + 463^2 .

It is not an unprimeable number, because it can be changed into a prime (1507139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 376783 + ... + 376786.

2^1507138 is an apocalyptic number.

1507138 is a deficient number, since it is larger than the sum of its proper divisors (753572).

1507138 is an equidigital number, since it uses as much as digits as its factorization.

1507138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753571.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 1507138 is about 1227.6554891337. The cubic root of 1507138 is about 114.6527141097.

The spelling of 1507138 in words is "one million, five hundred seven thousand, one hundred thirty-eight".