7405013021 has 16 divisors (see below), whose sum is σ = 8489925504. Its totient is φ = 6326904384.

The previous prime is 7405012981. The next prime is 7405013029. The reversal of 7405013021 is 1203105047.

It is a cyclic number.

It is not a de Polignac number, because 7405013021 - 2⁶ = 7405012957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7405013029) 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, 3965330 + ... + 3967196.

It is an arithmetic number, because the mean of its divisors is an integer number (530620344).

Almost surely, 2^7405013021 is an apocalyptic number.

It is an amenable number.

7405013021 is a deficient number, since it is larger than the sum of its proper divisors (1084912483).

7405013021 is a wasteful number, since it uses less digits than its factorization.

7405013021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3380.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 7405013021 is about 86052.3853300999. The cubic root of 7405013021 is about 1949.1350993238.

Adding to 7405013021 its reverse (1203105047), we get a palindrome (8608118068).

The spelling of 7405013021 in words is "seven billion, four hundred five million, thirteen thousand, twenty-one".