1542925961 has 4 divisors (see below), whose sum is σ = 1543031424. Its totient is φ = 1542820500.

The previous prime is 1542925939. The next prime is 1542925963. The reversal of 1542925961 is 1695292451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1542925961 - 2⁶ = 1542925897 is a prime.

It is a super-2 number, since 2×1542925961² = 4761241042255547042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1542925963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26405 + ... + 61506.

It is an arithmetic number, because the mean of its divisors is an integer number (385757856).

Almost surely, 2^1542925961 is an apocalyptic number.

It is an amenable number.

1542925961 is a deficient number, since it is larger than the sum of its proper divisors (105463).

1542925961 is an equidigital number, since it uses as much as digits as its factorization.

1542925961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105462.

The product of its digits is 194400, while the sum is 44.

The square root of 1542925961 is about 39280.0962447904. The cubic root of 1542925961 is about 1155.5312513958.

The spelling of 1542925961 in words is "one billion, five hundred forty-two million, nine hundred twenty-five thousand, nine hundred sixty-one".