7121516 has 6 divisors (see below), whose sum is σ = 12462660. Its totient is φ = 3560756.

The previous prime is 7121509. The next prime is 7121519. The reversal of 7121516 is 6151217.

It is a junction number, because it is equal to n+sod(n) for n = 7121491 and 7121500.

It is not an unprimeable number, because it can be changed into a prime (7121519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 890186 + ... + 890193.

It is an arithmetic number, because the mean of its divisors is an integer number (2077110).

Almost surely, 2^7121516 is an apocalyptic number.

It is an amenable number.

7121516 is a deficient number, since it is larger than the sum of its proper divisors (5341144).

7121516 is a wasteful number, since it uses less digits than its factorization.

7121516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1780383 (or 1780381 counting only the distinct ones).

The product of its digits is 420, while the sum is 23.

The square root of 7121516 is about 2668.6168702157. The cubic root of 7121516 is about 192.3936872913.

Subtracting from 7121516 its reverse (6151217), we obtain a cube (970299 = 99³).

The spelling of 7121516 in words is "seven million, one hundred twenty-one thousand, five hundred sixteen".