1331025542 has 16 divisors (see below), whose sum is σ = 2489190912. Its totient is φ = 518581320.

The previous prime is 1331025541. The next prime is 1331025583. The reversal of 1331025542 is 2455201331.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331025541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4321358 + ... + 4321665.

It is an arithmetic number, because the mean of its divisors is an integer number (155574432).

Almost surely, 2^1331025542 is an apocalyptic number.

1331025542 is a deficient number, since it is larger than the sum of its proper divisors (1158165370).

1331025542 is a wasteful number, since it uses less digits than its factorization.

1331025542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8643043.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 1331025542 is about 36483.2227469011. Note that the first 3 decimals coincide. The cubic root of 1331025542 is about 1100.0070363186.

Adding to 1331025542 its reverse (2455201331), we get a palindrome (3786226873).

The spelling of 1331025542 in words is "one billion, three hundred thirty-one million, twenty-five thousand, five hundred forty-two".