6121402465 has 4 divisors (see below), whose sum is σ = 7345682964. Its totient is φ = 4897121968.

The previous prime is 6121402451. The next prime is 6121402477. The reversal of 6121402465 is 5642041216.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3824309281 + 2297093184 = 61841^2 + 47928^2 .

It is a cyclic number.

It is not a de Polignac number, because 6121402465 - 2¹³ = 6121394273 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 612140242 + ... + 612140251.

It is an arithmetic number, because the mean of its divisors is an integer number (1836420741).

Almost surely, 2^6121402465 is an apocalyptic number.

It is an amenable number.

6121402465 is a deficient number, since it is larger than the sum of its proper divisors (1224280499).

6121402465 is a wasteful number, since it uses less digits than its factorization.

6121402465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224280498.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 6121402465 is about 78239.3920285683. The cubic root of 6121402465 is about 1829.2945677025.

The spelling of 6121402465 in words is "six billion, one hundred twenty-one million, four hundred two thousand, four hundred sixty-five".