1540602131 has 4 divisors (see below), whose sum is σ = 1540893192. Its totient is φ = 1540311072.

The previous prime is 1540602079. The next prime is 1540602179. The reversal of 1540602131 is 1312060451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1312060451 = 13 ⋅100927727.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1540602131 is a prime.

It is a super-2 number, since 2×1540602131² = 4746909852083482322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1540602097 and 1540602106.

It is not an unprimeable number, because it can be changed into a prime (1540602181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137441 + ... + 148226.

It is an arithmetic number, because the mean of its divisors is an integer number (385223298).

Almost surely, 2^1540602131 is an apocalyptic number.

1540602131 is a deficient number, since it is larger than the sum of its proper divisors (291061).

1540602131 is an equidigital number, since it uses as much as digits as its factorization.

1540602131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291060.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1540602131 is about 39250.5048502564. The cubic root of 1540602131 is about 1154.9508374094.

Adding to 1540602131 its reverse (1312060451), we get a palindrome (2852662582).

The spelling of 1540602131 in words is "one billion, five hundred forty million, six hundred two thousand, one hundred thirty-one".