61487129 has 4 divisors (see below), whose sum is σ = 67076880. Its totient is φ = 55897380.

The previous prime is 61487117. The next prime is 61487131. The reversal of 61487129 is 92178416.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 61487129 - 2¹⁶ = 61421593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61487092 and 61487101.

It is not an unprimeable number, because it can be changed into a prime (61487149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2794859 + ... + 2794880.

It is an arithmetic number, because the mean of its divisors is an integer number (16769220).

Almost surely, 2^61487129 is an apocalyptic number.

It is an amenable number.

61487129 is a deficient number, since it is larger than the sum of its proper divisors (5589751).

61487129 is a wasteful number, since it uses less digits than its factorization.

61487129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5589750.

The product of its digits is 24192, while the sum is 38.

The square root of 61487129 is about 7841.3729027512. The cubic root of 61487129 is about 394.6948002978.

It can be divided in two parts, 61487 and 129, that added together give a palindrome (61616).

The spelling of 61487129 in words is "sixty-one million, four hundred eighty-seven thousand, one hundred twenty-nine".