1520345442 has 128 divisors (see below), whose sum is σ = 3898368000. Its totient is φ = 391843200.

The previous prime is 1520345423. The next prime is 1520345459. The reversal of 1520345442 is 2445430251.

It is a super-2 number, since 2×1520345442² = 4622900526020350728, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5410342 + ... + 5410622.

It is an arithmetic number, because the mean of its divisors is an integer number (30456000).

Almost surely, 2^1520345442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1520345442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1949184000).

1520345442 is an abundant number, since it is smaller than the sum of its proper divisors (2378022558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1520345442 is a wasteful number, since it uses less digits than its factorization.

1520345442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557 (or 543 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 1520345442 is about 38991.6073277314. The cubic root of 1520345442 is about 1149.8665105294.

Adding to 1520345442 its reverse (2445430251), we get a palindrome (3965775693).

The spelling of 1520345442 in words is "one billion, five hundred twenty million, three hundred forty-five thousand, four hundred forty-two".