1021440272 has 40 divisors (see below), whose sum is σ = 1996765056. Its totient is φ = 506169216.

The previous prime is 1021440271. The next prime is 1021440283. The reversal of 1021440272 is 2720441201.

It is not an unprimeable number, because it can be changed into a prime (1021440271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1156343 + ... + 1157225.

Almost surely, 2^1021440272 is an apocalyptic number.

It is an amenable number.

1021440272 is a deficient number, since it is larger than the sum of its proper divisors (975324784).

1021440272 is a wasteful number, since it uses less digits than its factorization.

1021440272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1455 (or 1449 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 1021440272 is about 31959.9792240233. The cubic root of 1021440272 is about 1007.0962810128.

Adding to 1021440272 its reverse (2720441201), we get a palindrome (3741881473).

The spelling of 1021440272 in words is "one billion, twenty-one million, four hundred forty thousand, two hundred seventy-two".