61426540 has 24 divisors (see below), whose sum is σ = 147424032. Its totient is φ = 21060480.

The previous prime is 61426501. The next prime is 61426567. The reversal of 61426540 is 4562416.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 61426499 and 61426508.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219241 + ... + 219520.

It is an arithmetic number, because the mean of its divisors is an integer number (6142668).

Almost surely, 2^61426540 is an apocalyptic number.

It is an amenable number.

61426540 is an abundant number, since it is smaller than the sum of its proper divisors (85997492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61426540 is a wasteful number, since it uses less digits than its factorization.

61426540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438777 (or 438775 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 61426540 is about 7837.5085326907. The cubic root of 61426540 is about 394.5651144980.

Adding to 61426540 its reverse (4562416), we get a palindrome (65988956).

The spelling of 61426540 in words is "sixty-one million, four hundred twenty-six thousand, five hundred forty".