7285902921 has 48 divisors (see below), whose sum is σ = 11746829952. Its totient is φ = 4314508800.

The previous prime is 7285902907. The next prime is 7285902941. The reversal of 7285902921 is 1292095827.

It is a happy number.

It is not a de Polignac number, because 7285902921 - 2²¹ = 7283805769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7285902941) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 789691 + ... + 798863.

It is an arithmetic number, because the mean of its divisors is an integer number (244725624).

Almost surely, 2^7285902921 is an apocalyptic number.

7285902921 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

7285902921 is a deficient number, since it is larger than the sum of its proper divisors (4460927031).

7285902921 is a wasteful number, since it uses less digits than its factorization.

7285902921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9374 (or 9371 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 7285902921 is about 85357.5006721729. The cubic root of 7285902921 is about 1938.6279064916.

The spelling of 7285902921 in words is "seven billion, two hundred eighty-five million, nine hundred two thousand, nine hundred twenty-one".