1021199954 has 32 divisors (see below), whose sum is σ = 1736847360. Its totient is φ = 447757200.

The previous prime is 1021199953. The next prime is 1021199969. The reversal of 1021199954 is 4599911201.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1021199951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8249 + ... + 45939.

It is an arithmetic number, because the mean of its divisors is an integer number (54276480).

Almost surely, 2^1021199954 is an apocalyptic number.

1021199954 is a deficient number, since it is larger than the sum of its proper divisors (715647406).

1021199954 is a wasteful number, since it uses less digits than its factorization.

1021199954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37766.

The product of its (nonzero) digits is 29160, while the sum is 41.

The square root of 1021199954 is about 31956.2193320799. The cubic root of 1021199954 is about 1007.0172937391.

The spelling of 1021199954 in words is "one billion, twenty-one million, one hundred ninety-nine thousand, nine hundred fifty-four".