10620405 has 48 divisors (see below), whose sum is σ = 19324656. Its totient is φ = 5391360.

The previous prime is 10620397. The next prime is 10620439. The reversal of 10620405 is 50402601.

10620405 = 53² + 54² + ... + 317².

It is a happy number.

10620405 is a `hidden beast` number, since 1 + 0 + 620 + 40 + 5 = 666.

10620405 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 527076 + 10093329 = 726^2 + 3177^2 .

It is not a de Polignac number, because 10620405 - 2³ = 10620397 is a prime.

It is a super-2 number, since 2×10620405² = 225586004728050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 145449 + ... + 145521.

It is an arithmetic number, because the mean of its divisors is an integer number (402597).

Almost surely, 2^10620405 is an apocalyptic number.

10620405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10620405 is a deficient number, since it is larger than the sum of its proper divisors (8704251).

10620405 is a wasteful number, since it uses less digits than its factorization.

10620405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198 (or 195 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 10620405 is about 3258.8962855544. The cubic root of 10620405 is about 219.8097873797.

It can be divided in two parts, 10620 and 405, that added together give a square (11025 = 105²).

The spelling of 10620405 in words is "ten million, six hundred twenty thousand, four hundred five".