6405120501 has 16 divisors (see below), whose sum is σ = 9231048960. Its totient is φ = 3927061440.

The previous prime is 6405120499. The next prime is 6405120503. The reversal of 6405120501 is 1050215046.

It is an interprime number because it is at equal distance from previous prime (6405120499) and next prime (6405120503).

It is not a de Polignac number, because 6405120501 - 2¹ = 6405120499 is a prime.

It is a super-3 number, since 3×6405120501³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6405120503) 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, 292446 + ... + 313583.

It is an arithmetic number, because the mean of its divisors is an integer number (576940560).

Almost surely, 2^6405120501 is an apocalyptic number.

It is an amenable number.

6405120501 is a deficient number, since it is larger than the sum of its proper divisors (2825928459).

6405120501 is a wasteful number, since it uses less digits than its factorization.

6405120501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606316.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 6405120501 is about 80031.9967325569. The cubic root of 6405120501 is about 1857.1305527060.

Adding to 6405120501 its reverse (1050215046), we get a palindrome (7455335547).

The spelling of 6405120501 in words is "six billion, four hundred five million, one hundred twenty thousand, five hundred one".