7402557121 has 4 divisors (see below), whose sum is σ = 7403501232. Its totient is φ = 7401613012.

The previous prime is 7402557101. The next prime is 7402557131. The reversal of 7402557121 is 1217552047.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7402557121 - 2¹¹ = 7402555073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7402557101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 460195 + ... + 476008.

It is an arithmetic number, because the mean of its divisors is an integer number (1850875308).

Almost surely, 2^7402557121 is an apocalyptic number.

It is an amenable number.

7402557121 is a deficient number, since it is larger than the sum of its proper divisors (944111).

7402557121 is an equidigital number, since it uses as much as digits as its factorization.

7402557121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944110.

The product of its (nonzero) digits is 19600, while the sum is 34.

The square root of 7402557121 is about 86038.1143505598. The cubic root of 7402557121 is about 1948.9195962058.

The spelling of 7402557121 in words is "seven billion, four hundred two million, five hundred fifty-seven thousand, one hundred twenty-one".