1405125131 has 4 divisors (see below), whose sum is σ = 1466217552. Its totient is φ = 1344032712.

The previous prime is 1405125091. The next prime is 1405125133. The reversal of 1405125131 is 1315215041.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1405125131 is a prime.

It is a super-2 number, since 2×1405125131² = 3948753267535534322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 61092397 = 1405125131 / (1 + 4 + 0 + 5 + 1 + 2 + 5 + 1 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1405125097 and 1405125106.

It is not an unprimeable number, because it can be changed into a prime (1405125133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30546176 + ... + 30546221.

It is an arithmetic number, because the mean of its divisors is an integer number (366554388).

Almost surely, 2^1405125131 is an apocalyptic number.

1405125131 is a deficient number, since it is larger than the sum of its proper divisors (61092421).

1405125131 is an equidigital number, since it uses as much as digits as its factorization.

1405125131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61092420.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1405125131 is about 37484.9987461651. The cubic root of 1405125131 is about 1120.0523814256.

The spelling of 1405125131 in words is "one billion, four hundred five million, one hundred twenty-five thousand, one hundred thirty-one".