61502001 has 12 divisors (see below), whose sum is σ = 90135696. Its totient is φ = 37273720.

The previous prime is 61501963. The next prime is 61502003. The reversal of 61502001 is 10020516.

61502001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-61502001 is a prime.

It is a super-2 number, since 2×61502001² = 7564992254008002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61502003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84351 + ... + 85076.

It is an arithmetic number, because the mean of its divisors is an integer number (7511308).

Almost surely, 2^61502001 is an apocalyptic number.

It is an amenable number.

61502001 is a deficient number, since it is larger than the sum of its proper divisors (28633695).

61502001 is a wasteful number, since it uses less digits than its factorization.

61502001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169452 (or 169441 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 61502001 is about 7842.3211487416. The cubic root of 61502001 is about 394.7266195743.

Adding to 61502001 its reverse (10020516), we get a palindrome (71522517).

The spelling of 61502001 in words is "sixty-one million, five hundred two thousand, one".