1541625139 has 2 divisors, whose sum is σ = 1541625140. Its totient is φ = 1541625138.

The previous prime is 1541625119. The next prime is 1541625143. The reversal of 1541625139 is 9315261451.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1541625139 - 2²¹ = 1539527987 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1541625098 and 1541625107.

It is not a weakly prime, because it can be changed into another prime (1541625109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770812569 + 770812570.

It is an arithmetic number, because the mean of its divisors is an integer number (770812570).

Almost surely, 2^1541625139 is an apocalyptic number.

1541625139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1541625139 is an equidigital number, since it uses as much as digits as its factorization.

1541625139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 37.

The square root of 1541625139 is about 39263.5344690210. The cubic root of 1541625139 is about 1155.2064220054.

The spelling of 1541625139 in words is "one billion, five hundred forty-one million, six hundred twenty-five thousand, one hundred thirty-nine".