740153261 has 4 divisors (see below), whose sum is σ = 741568992. Its totient is φ = 738737532.

The previous prime is 740153251. The next prime is 740153311. The reversal of 740153261 is 162351047.

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 a cyclic number.

It is not a de Polignac number, because 740153261 - 2¹⁴ = 740136877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (740153201) 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, 707081 + ... + 708126.

It is an arithmetic number, because the mean of its divisors is an integer number (185392248).

Almost surely, 2^740153261 is an apocalyptic number.

It is an amenable number.

740153261 is a deficient number, since it is larger than the sum of its proper divisors (1415731).

740153261 is a wasteful number, since it uses less digits than its factorization.

740153261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1415730.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 740153261 is about 27205.7578648344. The cubic root of 740153261 is about 904.5666091305.

The spelling of 740153261 in words is "seven hundred forty million, one hundred fifty-three thousand, two hundred sixty-one".