651139 has 2 divisors, whose sum is σ = 651140. Its totient is φ = 651138.

The previous prime is 651127. The next prime is 651143. The reversal of 651139 is 931156.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 651139 - 2⁹ = 650627 is a prime.

It is not a weakly prime, because it can be changed into another prime (651109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325569 + 325570.

It is an arithmetic number, because the mean of its divisors is an integer number (325570).

2⁶⁵¹¹³⁹ is an apocalyptic number.

651139 is a deficient number, since it is larger than the sum of its proper divisors (1).

651139 is an equidigital number, since it uses as much as digits as its factorization.

651139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 810, while the sum is 25.

The square root of 651139 is about 806.9318434663. The cubic root of 651139 is about 86.6744782571.

The spelling of 651139 in words is "six hundred fifty-one thousand, one hundred thirty-nine".