140262649 has 2 divisors, whose sum is σ = 140262650. Its totient is φ = 140262648.

The previous prime is 140262623. The next prime is 140262653. The reversal of 140262649 is 946262041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139122025 + 1140624 = 11795^2 + 1068^2 .

It is a cyclic number.

It is not a de Polignac number, because 140262649 - 2¹⁷ = 140131577 is a prime.

It is a super-2 number, since 2×140262649² = 39347221408994402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (140262659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70131324 + 70131325.

It is an arithmetic number, because the mean of its divisors is an integer number (70131325).

Almost surely, 2^140262649 is an apocalyptic number.

It is an amenable number.

140262649 is a deficient number, since it is larger than the sum of its proper divisors (1).

140262649 is an equidigital number, since it uses as much as digits as its factorization.

140262649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 140262649 is about 11843.2533114850. The cubic root of 140262649 is about 519.5739224256.

The spelling of 140262649 in words is "one hundred forty million, two hundred sixty-two thousand, six hundred forty-nine".