61042631 has 12 divisors (see below), whose sum is σ = 69990912. Its totient is φ = 53030016.

The previous prime is 61042609. The next prime is 61042633. The reversal of 61042631 is 13624016.

61042631 = T₃₀₅₈ + T₃₀₅₉ + ... + T₃₀₇₀.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-61042631 is a prime.

It is a super-2 number, since 2×61042631² = 7452405598804322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61042597 and 61042606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61042633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7751 + ... + 13496.

It is an arithmetic number, because the mean of its divisors is an integer number (5832576).

Almost surely, 2^61042631 is an apocalyptic number.

61042631 is a deficient number, since it is larger than the sum of its proper divisors (8948281).

61042631 is a wasteful number, since it uses less digits than its factorization.

61042631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21290 (or 21277 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 61042631 is about 7812.9783693544. The cubic root of 61042631 is about 393.7414001313.

Adding to 61042631 its reverse (13624016), we get a palindrome (74666647).

The spelling of 61042631 in words is "sixty-one million, forty-two thousand, six hundred thirty-one".