1442987156 has 36 divisors (see below), whose sum is σ = 2842908852. Its totient is φ = 637025664.

The previous prime is 1442987153. The next prime is 1442987197. The reversal of 1442987156 is 6517892441.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 975562756 + 467424400 = 31234^2 + 21620^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1442987156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1442987153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1280 + ... + 53736.

Almost surely, 2^1442987156 is an apocalyptic number.

It is an amenable number.

1442987156 is a deficient number, since it is larger than the sum of its proper divisors (1399921696).

1442987156 is a wasteful number, since it uses less digits than its factorization.

1442987156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52520 (or 52495 counting only the distinct ones).

The product of its digits is 483840, while the sum is 47.

The square root of 1442987156 is about 37986.6707675205. The cubic root of 1442987156 is about 1130.0235346340.

The spelling of 1442987156 in words is "one billion, four hundred forty-two million, nine hundred eighty-seven thousand, one hundred fifty-six".