61245049 has 2 divisors, whose sum is σ = 61245050. Its totient is φ = 61245048.

The previous prime is 61245047. The next prime is 61245053. The reversal of 61245049 is 94054216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54834025 + 6411024 = 7405^2 + 2532^2 .

It is a cyclic number.

It is not a de Polignac number, because 61245049 - 2¹ = 61245047 is a prime.

Together with 61245047, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 61245049.

It is not a weakly prime, because it can be changed into another prime (61245047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30622524 + 30622525.

It is an arithmetic number, because the mean of its divisors is an integer number (30622525).

Almost surely, 2^61245049 is an apocalyptic number.

It is an amenable number.

61245049 is a deficient number, since it is larger than the sum of its proper divisors (1).

61245049 is an equidigital number, since it uses as much as digits as its factorization.

61245049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 61245049 is about 7825.9216070697. The cubic root of 61245049 is about 394.1761368153.

The spelling of 61245049 in words is "sixty-one million, two hundred forty-five thousand, forty-nine".