1550457129 has 8 divisors (see below), whose sum is σ = 2226297472. Its totient is φ = 954127440.

The previous prime is 1550457113. The next prime is 1550457151. The reversal of 1550457129 is 9217540551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1550457129 - 2⁴ = 1550457113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 39755311 = 1550457129 / (1 + 5 + 5 + 0 + 4 + 5 + 7 + 1 + 2 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1550457109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19877617 + ... + 19877694.

It is an arithmetic number, because the mean of its divisors is an integer number (278287184).

Almost surely, 2^1550457129 is an apocalyptic number.

It is an amenable number.

1550457129 is a deficient number, since it is larger than the sum of its proper divisors (675840343).

1550457129 is a wasteful number, since it uses less digits than its factorization.

1550457129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39755327.

The product of its (nonzero) digits is 63000, while the sum is 39.

The square root of 1550457129 is about 39375.8444861821. The cubic root of 1550457129 is about 1157.4082865943.

The spelling of 1550457129 in words is "one billion, five hundred fifty million, four hundred fifty-seven thousand, one hundred twenty-nine".