61240157 has 12 divisors (see below), whose sum is σ = 68425308. Its totient is φ = 54753600.

The previous prime is 61240147. The next prime is 61240163. The reversal of 61240157 is 75104216.

It can be written as a sum of positive squares in 2 ways, for example, as 33477796 + 27762361 = 5786^2 + 5269^2 .

It is not a de Polignac number, because 61240157 - 2⁸ = 61239901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61240117) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3233 + ... + 11529.

It is an arithmetic number, because the mean of its divisors is an integer number (5702109).

Almost surely, 2^61240157 is an apocalyptic number.

It is an amenable number.

61240157 is a deficient number, since it is larger than the sum of its proper divisors (7185151).

61240157 is a wasteful number, since it uses less digits than its factorization.

61240157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8380 (or 8369 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 61240157 is about 7825.6090497801. The cubic root of 61240157 is about 394.1656414852.

The spelling of 61240157 in words is "sixty-one million, two hundred forty thousand, one hundred fifty-seven".